history

CZECH HISTORY AND PRIVATE TODO LIST FOR SMART CACHE

12.3.98 Smart Cache projekt zahajen
17.3.98 POST Metoda by mela fungovat, ale je to nevyzkouseno.
19.3.98 Core is working!
20.3.98 0.10 
         zvysena inteligence IMS pri refresh object
         zlepsen mechanizmus detekce nepotrebnych dircache entry v pameti
         zvetsen io buffer na 2048 bajtu - otestovano na rychlost.
         zvetsen backgroundsave & GC interval na 10 minut
         zlepsena multi-thread synchronizace, aby se zabranilo mozne ztrate 
          dat

0.11 
     nove direktivy:
     
     no_proxy
     redir
     fail

     lepsi empty dir_cleanup - jede mazat take nahoru v hierarchii
     adresar se maze v garbage col fazi, ne v save fazi

21.3.98

0.12 pokud klienti posilaji IMS request a nelze se spojit, vratime 304

     garbage collection zatim umi jen likvidovat unreferenced files :)
     ale porad lepsi nez nic

     pridany hlavicky do error message jako ma squid. Tj. last-modified
     a expires na 5 minut.
     
     pridana hlavicka Date do cache-reply requestu, pry to nektere
     browsery pouzivaji. Nevim k cemu.
     
     quick abort feature
          

22.3.98

0.13 pri 404 zlikvidujeme objekt v cache
     cachujeme jen urcite http response kody. Chyby NE, abychom si
     nesmazali pripadny dobry objekt chybou.

      vymazavani tmp souboru pri prerusenych transferech

     podporovat case-insensitive filesystemy (HPFS, NTFS) nejlepe s autodetekci
     blbost BFU je nezmerna

     moznost nastavit zda budeme cachovat i pragma-no cache a expires s time<now

23.3.98

0.14
    Cache oznamuje i testovani objektu na zmeny
    
    pri vyuziti pokracovani klientem preruseneho prenosu dat neni
    nutne jiz cekat pred prerusenim na odpoved vzdaleneho serveru
    
    Pridana podpora pro soucasny download jednoho objektu vice klienty
    
    shutdown flag
    
24.3.98
    
0.15 
     opravena chyba zpusobujici nefunkcnost POST requestu
     
     podepisovani se do user-agent hlavicek
     
0.16
      opet zlepsena eliminace moznych kolizi pri soucasnem vicenasobnem
      downloadu jednoho objektu.
      
      test zda mohou jmena koncit na .
      
      vyhazovani keep-alive zadosti z requestu
      
0.17  funguje i s developer.javasoft.com !! (posila chybne expires hlavicky)
      
0.18 pokud dojte pri refresh objektu k chybe, dostane klient stary objekt
     zlepsena obsluha chyb pri cteni hlavicek ze serveru.
     
0.19 
/    odstranovani pragma: hlavicek z requestu klientu, snad to vyresi
/    problem s divne se chovajicimi servery pri IMS (viz apache docs).
     
     odstraneny z 304 odpovedi prebytecne hlavicky, jak to vyzaduje
     definice HTTP/1.1
     
     zmeneny velikosti pismen v odesilanych hlavickach, aby to odpovidalo
     norme. Nelze vyloucit, ze nejake servery delaji case-sensitive porovnani.
     
     do dulezitych datumu piseme opravdovy den v tydnu misto nedele
     
0.20 new cacheinfo filez (last access time) + konverzni utilita
      +10% .cacheinfo filez size     
      
      rychlejsi exit pri shutdown flagu
      
      vypis chyb pri POST v OFFLINE rezimu
      
      pridavani hlavicky server do error messages
      
      error messages maji misto no-cache nastavenou expiraci na 5 minut.
      
      zapis datumu do error messages je nyni korektni vcetne dne v tydnu.
      
      datumy jsou uz psany ve spravnem formatu, dny v mesici < 10
      jsou nyni doplnovany nulami. 

0.25 

       misto target not set vracime srozumitelnejsi hlasku - host unknown      
           
0.26 6.6.1997

      zlepseno vyreseni konfliktu adresare a souboru stejneho jmena
      
      zlepseno osetreni filesystemcheck pri prvotnim spusteni scache
      
      timeouty
      
      pracovat i kdyz directory create fails
      
      necachuje se metoda HEAD !
      
      Pridavani portu do host hlavicek
      
0.27  FORWARDER ! 23.6.1998

      necachuji se privatni http-dokumenty

      default_forward_for ncic.netmag.cz 
      
      access logy podle masky
      
      zvetseny lokalni buffery pri IO operacich z 512 na 4096 bajtu pro
      hloupe operacny systemy, ktere spatne cachuji (zejmena OS/2)
      
      opravena chyba pri bindovani socketu - nyni program nezustane viset
      
      registrace 
      
      volba bind to ip
      
      classes hashed..
      
      vicenasobny refresh patterny, TTL masky
      
      250 Pages/min !
      
      max_clients;
      
      ignorovat forced-reload reguesty klientu
      
0.28
      obsluha chyb pri cteni pozkozenych .cacheinfo souboru, nyni se smazou pri
      -killunref spolu s celym adresarem.
      
      mirne zrychleno ukladani .cacheinfo souboru na disk
      
      optimalizace hashtabulky dircache - startuje na velikosti 25
      
      nahrazeni equals("") length()==0
      
      vsechny (?) metody jsou nyni final
      
      opraveny hlavicky 304 pri load obj. failed podle normy
      
      neposilat hlavicky expire<now.
      
      netestuje se zda je filesystem case-sensitive - stejne to nemelo
      zadny prakticky vyznam. Nekoverti se jmena adresaru na mala pismena
      na non-case-sensitive filesystemech.
      
      posilat neexistujici stranky na serveru z cache
      
      fake last_modified header
      
      325 ErrorPages/min
      
0.29
      command-line option -faststart       
      
      operavena chyba zpusobujici necachovani dokumentu pokud 
      neobsahuji expired hlavicku pokud by bylo pragma_nocache 0 
      
      vylepseno generovani last-mod. headers, nyni funguje i pri "pruchozich"
      objektech.
      
      optimalizace generovani chybovych zprav - bohuzel vykon se meritelne nezvedl...
      
      posilat stranky z cache pri chybe serveru
      
      
0.30 3.8.1998
     opraven spatne pocitany refresh v komercni verzi
     
     test zda neni last-modified v budoucnu
     
     garbage collection!
     
     bugfix create temporary file v adresarich, ktere nebylo mozne vytvorit.
     
     bugs: pri load failed zustane nekdy reference na objekt!
     
0.31 18.8.1998
 
    odstranena chyba v -killunref/gc. Unreferenced soubory se mazali
    ob jeden. Tato chyba byla ve verzi 0.30     
    
    zlepsena obsluha chyb pri loadingu
    
    new option in generate_lastmod 
    
    pri deleni na adresar se jiz zohlednuje i : - problem s developer.com
    deleni adresare je nyni rychlejsi
    
0.32 odstranen bug v GC, kdyz mame v cache malo objektu    
    
0.33 5.9.98
     403 error kod pridan do 'remote server errror'
     snad opravena obcasna nefunkcnost direktiv
        bugs: send deleted a send on error obcas nefunguje???
        
     opravena matouci hlaska another rescan v GC
     
     pise se velikost objektu
     
     nepise se delta if unrefreshable
     
     default maxobjectsize pro GC  je 10 MB misto 4 MB
     
      check: deleted hot dir?
     
0.34 12.9.98
      zoptimalizovana fuknce dir_cleanup
      
      pridana hlavicka proxy-connection: close do ERROR zprav - netscape
       se kupodivu zrychlil
       
       Specialni Fail dokument
       
       Opravdu se uz necachuji password-protected dokumenty!!
       
       moznost vyhazovat pragma no-cache hlavicky z requestu.
       
       mirne vizualne upraveno chybove hlaseni
       
       nedulezite hlasky se posilaji na stderr
       
0.35   20.9
       
       zlepsena kontrola pri vicenasobnem load stejneho objektu       
       
       referer_hack
       
       fix pro kreteny co neumi psat http malymi pismeny

       BindAddress na * v registrovane verzi
              
0.36   20.11
       podpora pro anchor (#) v requestech
       
       hlaska cleaned empty dir se posila na stderr
       
       fake_referer
       
       fake_user_agent
       
0.37   18.12

       no_proxy, pass, fail, nocaching, cacheonly
           muze mit vice polozek na radce oddelenych mezerou
           
       podpora pro HEAD requesty. Nyni jiz neposle cely text, ale jen
       hlavicku. Nejake idiotske web grabery to pletlo
       
       odstraneny REGISTERED version only features.
       Nyni jdou uz vsechny. Nebavilo mne posilat lidem neustale reg. klice.
       
       registracni klice jiz nejsou potreba
       
       jiz neblbne pri spatnem konfigu. Obcas vypisuje i cislo radky v cfg
       souboru.
       
       minor speed improvent by changing indexof

       podporovat http://login:passwd@www.foo.com ?
        browser posila Authorization: Basic aHNuOnplcm8=
              mimecoded hsn:zero
              
       minor gen name speedup
       
       default filename is configurable
       
       numbers are inserted on start of filename, not end.
       
       adbusters & lastvercheck support taken out
       
       support for gatewaying other protocols packed into HTTP
         podporovat ftp://zz.yy/ -> zz.yy_ftp
         
       noproxy jiz neni case-sensitivni
       
       noproxy localhost will no longer match localhost.domain
       
       logfiles are now closed when smartcache is iddle
       
       fake_referer is alias for referer_hack <URL>
       
       agent logging
       
       agent_log pattern filename
       
       referer_log pattern filename
       
       synchronize on log writers

       protocol not supported by this proxy!
       
       fixx gc for ^ftp
       
       GC jiz nepada na spatnem konfiguracnim souboru tolik casto
       
       prepinac -local

0.38   10.2.1998

       cache_password_protected 0/1
       
       hlaska HTTP 0.9 servers are not supported
       
       requests no longer crash when got invalid content-size header
       
       v refresh time delta se rozlisuji dny (d) a minuty (m). opraveny
        zaporne hodnoty, snad je to uz lepe(?). dny se pouzivaji pokud je to
        vice nez 2 dny
       
       v chybove hlasce je content-type na prvni radce, pry nejaka mime definice
       ci co...
       
       default mime type je text/html
       
       fake garbage collector
       
       minor arg handling bugfix
       
       added socket linger option 
       
       case_sensitive_matching
      
0.39   10.3.1998

       fixed bug in forwarder, which has been broken from 0.37. Why nobody
       reports it?
       
       OUTGOING c00kies filter
       
       Expires header has now support for Microsoft IIS 4.0, which violates
        HTTP1.0+ protocol. We are Microsoft! WE ARE standard, you all must fix
        your software acording to our bugs.
        
       piseme delta i v hodinach

       hit miss stats
       
       repair podporuje i filenames -> prevede na adresar
       
       immediate_shutdown_flag
       
       fail_file
       pass_file
              
0.41   Wed Sep 8 1999

       nejake typos       

       zmeneno na open source software

       nacitani konfigurace z cfgdiru -cfgdir /etc

       podpora pro read-only filesystemy (CDROM)

       -cdrom path d1 d2 , manualni urceni cacherootu

       rebalancing directory po zmene d1 d2

       DONE: test na adresar cache, zda je read only

       repair vybaven -q prepinacem. Pise pouze chyby.

       repair dostal vylepsenou mime tabulku

       autodetekce read-only filesystemu

       import into scache

       zlepseni zpracovani command-line, mozno pouzit vice voleb
         soucasne

       repair umi nacitat externi tabulku mime.types

       repair ma jeste lepsi interni MIME ext tabulku

       reload_block files je nyni porad zapnuto

       anglicka dokumentace prekontrolovana pomoci ispell -d british

       varovani na chybejici CFG soubory je nyni (snad) jiz spravne..

0.42       
       2.4.2000

       repair: pozdejsi mime typ prepise predchozi

	repair: rekururzivni repair -r switch

	new keyword mime_types

        testovani delky souboru, zda je nekdo nezeditoval

        ignorovani novych souboru < 6 minut starych pri
	   kill_unref

	-p prepinac <port number>

	preorganizovan request.make_headers (date cpu vic dolu)

	pridan 307 http rc kod pro cacheable responses (temporary
	redirect)

	test existence cacheroot pri startu

	zlepsena detekce Lost directory pro linux, test na to zda se muze
	zapisovat do .cacheinfo souboru

	repair - pridan -f prepinac

	repair - pridan -x <exclude> prepinac

	repair - pridan -i <defaultfilename) prepinac

	repair - pridan -n prepinac (nedelej nic)

        import: pri kopirovani se zmeni timestamp

	import: funguje i na read-only filesystemech

	import: zkusi nejdrive rename a kdyz to selze tak copy

	import: regenerovani novych jmen pri konfliktnim jmenu opraveno

	repair maze prazdne adresare
	
        import: nejak blbne s /tmp/X11-unix... obsluha chyb pri copy...

	repair: ma inteligentnejsi hlasku start a neopakuje jiz pridane soubory

	generovani chybovych hlasek je rychlejsi (ekologicka varianta)

	errordocument 403 0 -- hardwired 1x1 empty GIF

	repair pridan do -x ! znak (smaze vse) a moznost dat vice masek
	oddelenych pathseparatorem (Unix :, Windoze ;)

	podpora pro PUT

	podpora pro OPTIONS

	podpora pro DELETE

	podpora pro TRACE -  castecna (neni spravne http/X.X)

	zlepsena podpora pro linger (setri sockety pri chybach)

	pridano vice quotes

        RC: posila 500 misto 400 pri load failed (like Apache)

	Zlepsene src/Makefile
	
        logovani se spravnou timezonou

	HTTPS a CONNECT

	odstraneny nektere lintian warningy

	pridan http rc 410 jako cachovaci

	GC uz nebezi na READ-ONLY cache

	kill-unref take ne

	filesystem check is now always performed

	test for read dirsize report

	Vsechny hlavicky Pragma: se zpracovavaji jako no cache
	 (some servers sends Pragma: private)

	 detekce spatneho cisla portu (ne cislo)

	CONNECT nyni funguje i na nelokalni servery

        allowconnect 443 563 80 8080 8000 25 21

	clear_flags_on_start 
        nastavit, zda mazat flagy pri startu SC

	fail_trace
        logovani fail na consoli

      vice citatu z Gity

      zlepsena obsluha necitelnych expire hlavicek

      fyzicka likvidace PNC a expire hlavicek z odpovedi

      visible_link

      stat_log

      repair umi komentare v ext. tabulce

      statistiky do souboru

      append_via

      cookies filter neni case sensitive

      opravena dirhash fce

0.43
     pise se chyba i pri load-headers fazi

     pise se detailnejsi informace pri testovani na validitu objektu

     opravena chyba v importu, pokud objekt jiz existuje.

     odstraneno setdirty

     zlepsena obsluha chyb pri load

     neimportovat hostname bez '.'

     vzdy delat FScheck a to zejmena pred importem

     referer_hack nebere non-numeric argumenty, use fake_referer instead

0.45 20.5.2000

     pracuje i pri 0 bytes diskspace free.

     nejake pokusy s descriptor-leakem pri close, snizen pocet syscallu.

     clean updirs nepada na null pri empty store

     opraven regexp.toString()

     touch LRU pri importu

     debug string v load pri unexpected rc

     refage<0 ji zakaze

     maxobjsize<0 ho zakaze

     rc 408 je temporary server error

     * se implicitne pridava k pravidlum v fail/pass cnf

     negativni cachovani nejakych 4XX chyb

     nikdy nemazeme localfile pri 404

     nocaching jiz opravdu funguje i pokud klient nebo server 
       posle pragma-no-cache

      EXPORT DAT! -export[date|lru|filedate] /tmp/zero 2d

0.46 8.8.2000 
      - neblbne pri disk full pri logovani do access.log
	
      FAILED se pise velkymi pismeny

      normalizace ..

0.47 27.9.2000
     Negative_cached_penalty (pro GC)

     repair ma -w prepinac

     repair nepada na adresarich kde nema pravo pro cteni

     lepsi obsluha out of diskspace

     nova struktura cacheinfo souboru + dokumentace pro ni

     podpora pro content-encoding
     
     www.finanztreff.de by mel pracovat

     auto_compress

     repair ma -c pro kompresi

     repair podporuje koncovku .gz pro kompresi gzip

     auto dekomprese

0.48 10.10.2000

     lepsi import podpora pro generovani localname koncici na .gz, vcetne
      _r
      Nepouzije data directory c:\
      pri testovani expire hlavicek pouzivat Date: ???
      expire se posunuje do naseho lokalniho casu
      pragma_no_cache 4 (redirects)
      if expire <= now, Pragma: no-cache is generated
      refresh_pattern ma 0.5 v default configuraci
      refresh pattern muze mit float

0.48.3 11.10.2000
	fixnuta compress filename gen chyba

	flushlogs pri immediate shutdown

	common log file format fixed 

0.49	27.10.2000
	redir a expire refresh pattern
        zjistit proc blbnou (jsou cachovany redirecty)

0.49.1  26.01.2001
      test filename s | na windoze/os2 (asi OK)
      
0.50   25.02.2001
	auto_decompress 2 - always
	auto_compress x

0.51   21.03.2001
	auto_compress 0 nekompresovat
	access_log * works again
	synchronized gc.java and mgr.java filename generator
	
0.52
	24.04.2001
     zmenena obsluha pri nacitani fail_file bez * -> *host/*
     nocompress .ext
     alive_flag

0.53    01.05.2001
	odstranen stack dump pri fatal err bind
	odstranen rounding error (monika bug)

0.54
	linger,etc

0.55	
	opravena chyba JS pri errordocument !
	opraven problem with filedate on FAT system (Monika)

0.56
       nefunguje kompilovana jikes
       opraveno delete aliveflag on normal shutdown (Hartmut Krafft)
       stopped typo

       cachedir muze mit mezery
       fakereferer a fake cookie take

       Cacheroot muze obsahovat mezery *vevnitr* for Mac

       -cfgdir handling cleanup

0.57
	codebase cleanup
	removed -convert020, -convert030
	removed adbusters

	renamed fail_trace to trace_fail

	increased default cache size to 100 mb

	-cfgdir fixed (Bastian Maerkisch)

	blocking https://* in fail.cnf now works

	removed fail, pass, allow_cookies_to, wafer options
	
        trace_url

        yes/no on/off support for case_sensitive,append_via,keep_deleted,
        cache_password_protected, remove_pragma_no_cache, trace_fail
        trace_url,hide_errors,full_referer_log

	trace_request

	trace_reply

	request compressed data from server when compression is enabled

0.58

       v trace se zmenilo < vs >

       fail hlaska pozmenena tak, aby pripominala ostatni trace hlasky

       added refresh engine tracing

       trace_abort

       on/off mohou byt i true a false

       allow_all_session_cookies

       trace_cookies

       Gc loops over and do not deletes anything?

0.59
       lepsi hlasky z traceru refresh engine 

       fixed reloading if -cfgdir switch is used

       full regexp match

0.60
	removed zbynek lamer detector
	refresh casy se pisi lepe
	zlepsene hlasky pri trace refresh
        download machine support

0.61
	new file ui.java 
        port bez cisla nefunguje
	ui_port
	ui_bindaddress
	ui_hostname

	fixed message access denied for http 0.9 clients
	loader_add_missing
	loader_add_reloads
	loader_queue_file

0.62
	loader_add_depth
	loader_refresh_depth
	fixed setting auto add to off, disables refresh confirmation
	changed 202 message for DM
	unix scripts added
        prohlizeni queue + mazani queue
        prohlizeni nacachovaneho obsahu
	opraveno: pro UI se vzdy pouzije prime spojeni
	misto localhost se pouzije pro ui 127.0.0.1 - fix NS bug.
	UI welcome screen
	port numbers are printed on start
	local smart cache search

0.63
	FIX queue show displays URLs
	FIX search form in Netscape and Opera
	search dialog for browse and search

0.64    
        UI: URL deletion
	UI: Directory deletion
	fixed URL parser when protocol is null
	fixed saving directory after object is deleted
	fixed regexp patterns (no need to add .*substring.*)

0.65
        Repackaged, removed source from ZIP archive.
	Removed .classes from tar.gz archive
	turning on auto add missing pages from UI fixed 
	tar.gz distro
	non persistent objects are not shown in directory listing
	cache-control: reload
	nicer cache browser

0.66
	add missing/reloads disabled when ui_port is not defined
	added quotes to GUI HOMEPAGE
        fix for errordocument ! pro .js

0.67
	fix for URL with no * in fail.cnf
	added some missing <title> to GUI
	removed debug output from regexp engine
	added <title> to UI msgs.
	do not use download machine for downloading from ui_hostname
	check if we are using UI with right hostname, SC needs this
	for special UI request handling.
	
0.68
        dirstats reports removed dirs too.
	ansi_init patch for eCS
	loader_add_reloads renamed to loader_add_refresh
	full_referer_log yes/no in default sample cfg
	cache_sensitive_matching in gc.cnf accept yes/no values
	JmS pink gif patch
        generovat filename s .gz pokud dostaneme obsah zipped

0.69
	removed anti-windows parts from user manual
	fixed typo in GC
	periodic gc runner
        podpora IP access with submasking
	redebianized
        do not block UI strings by regexp
	sponsorship
	append_via removed
	proxyvia header
	bindaddress announced on startup
        https_proxy chaining

0.70
        -direct switch now works (broken in 0.69)
	UI added cache-control: no-cache to responses
	UI removed no-cache from redirects to good ui hostname
	too more clients -> too more connections
	send_from_cache now handles IMS requests in the correct way
	 (Needed for Opera5)
	Redirects to UI generates now last-modified-date in the past
	summary: Opera5 now works with redirects generated by SC (uff!)
	ui announces URL when adding it to loader queue, saves 1 goback.
	adding proxy-connection: close to all documents flying through.
	changed startup messages: host os -> filesystem
	updated troubleshoting
	removing not needed rules.

0.71
	" is needed to escape in UI
	renamed max-clients -> max connections
	fixed debug output from refresh engine when forced refresh is
	ignored.
	do not display choices for loader in ui home if not configured.
	fixed typo
	fixed netmask /n problem when n div 8 != 0
        Fixed problem with cfgdir and regex_fail

0.72
	cache searches are less cpu intensive
	fixed problems when auto deleting of patterns was too active on
	 refresh_patterns
	added seconds to delta reporting engine
        test googlu na .gz

0.73
         -nocache command line switch
	 -nofail  command line switch
	 -online  command line switch
	 -fastrefresh
	 -cookies
	 appending to existing via header

0.74
	- etags are now stored in .cacheinfo files
	- support for ETag / if-none-match
	- prepare methods for webdav/deltaV support, lack of documentation
	- do not use IMS when requesting files which are missing from cache
	  for full implementing
	- head requests do not fails on not yet cached object
        - repair handles better .txt.gz files when adding them	
	- user agent - added space before
	- fix for refresh and no if-mod-since header

0.75
	- UI: bindaddress shown
	- UI: show queue is not shown when there is no loader support
	- UI: file date instead mime type is shown
	urlmatching in GC corrected
	example for gc urlmask with protocol added to sample cfg
	fixed typo in gc output
	download_machine_ignore  URL

0.76
	loader ui accept also "" as default loader depth as default ui depth
	end of queue message displayed
	ui shows which urls is removed from queue
	-ui_port runs  UI on alternate port
	download_machine_mask -> download_machine_url_mask
	no more duplicate entrys in download machine file
	new feat dmachine_ctype_mask
	ui: dmachine queue show
	ui: dmachine queue delete
	trace messages are now good even if no http_proxy is used (side
	 effect of adding dm ctype hook)

0.77
        GC: minimum_object_size  (idea from squid)
	maximum_object_size is now in Bytes (not KB as before)
	agent-log removed
	referer log removed
	combined logfile format
	httprc are logged correctly
	transfered bytes also
	gc: small_object_penalty changed to be like LOP
	-nolog command line switch
	auto_decompress can also unpack deflate encoding which is default
	  by newer IIS servers.
	GC: cache byte size is now more exact
	GC: cache size is now long integer
	short refresh patterns are no longer allowed
	do not print that dirs are GC's there are freed. - remove user
	 confusion
	some hardcoded defaults was retuned
	DEBIAN: debconfed, removed chown and chmod fix
	unix: do not allow root to run system-wide scache, change uid to
	 proxy
        DEBIAN: support for logfiles
	-notrace
	-local switch now sets a maximum possible expire time (benchmarks
	results increased by 5%)
	note: increasing internal buffers from 4096 to 8192 lowers performance.
	log_common true/false
	new: dmachine_offline_url_mask command
	UI: port of main server is shown

0.78
        GC: do not allow average dirsize < blocksize
	reports now correct count of unlinked directories (updirs included)
	GC: deleted directory during GC pass is now correctly counted
	printdelta supports Months, years
        trace on/off to GUI.
	new configuration keyword loglevel
        speed up by reverse regsearch fail/pass
	on conflicting filenames, use random numbers, not loop over long
	 list of possible list of existing filenames. Really big performance
	 improvment for directory with about 1000 files with conflicting
	 filename (i.e. Google).
      verbose level do .cnf
        0 - nic
	1 - system errors 
	2 - operation errors
	3 - stats
	4 - operation
      look for etag and return 304 if exists and connection failed.
      force_ims_on_reloads pri forced refresh + nolastmod nepridavat lastmod
      http request method is printed on trace_url

0.79
      native gcj binary builds do not needs jdk installed
      first rule in pass/fail was allways matched insensitive
      pass/fail works again (bug in 0.78)
      podpora posilani content-length 0
      new config keyword `listenbacklog` defaults to 511

0.80
      depth po search je spravne nastaveno
      fixed npe pri bad method
      fixed cleandir
      smart cache now renames conflicting filename when needs to create
        directory
      search cache feature
      UI: purge search cache
      ui_searchcachefactor
      414 rc cacheable
      410 is also deleted
      debianizace pro apt
      report middle on gc cache summary

0.80.1
      combined log do not has doubles \n
      fixed crash for non-numeric depth in UI search dialog
0.81
      combined log has missing "
      UI: flush logs

0.82
      https funguje i pokud je definovana pouze http_proxy
      podpora persistent connections
      export can recognise floating point values as arguments
      values 1d can be now used in refresh patterns
      print notice when refresh pattern gets ignored
      trace_keepalive
      UI  ka trace
      keepalivetimeout (sec)
      console loglevel setup in UI
      remove end file separator from target export dir
      fixed scache -export bug from 0.54 version
      gcloglevel level
      tabulka pro 1x1 v zavislosti na cache size
      GC: improve reports somewhat
      test for not using root directory as cache data on windows somewhat
       improved.
      download_machine_ctype_ignore 
      mirne snizena pametova narocnost GC
      fakegc do not deletes files when =zzz rule is used
      GC: objects with ETag are checkable
      redirect_penalty option volba pro GC
      prepinat loglevel v UI

0.82.1
      fixed NPE bug on unknown hostname when not using http_proxy
      GC: no infinite loops on lopsizeinc=0  or sopsizedec=0
      GC: null modificators (i.e. +0 *1 -0) are detected and ignored
      aby se prepinaly on off knofliky
      
0.83
      keep-alive on input side
      trace_input_keepalive
      debug input keepalive
      disable TCP nagle as recommended by w3c
      improved synchronization on logs files
      log keepalive connections
      opravit synchronizaci v logovani
      max aborted transfer time je floating point
      opravena chyba - generovani file/dir clash funguje i pri exportu
      send reset on full cache
      refage je floating point, podpora 999999 jako maxrefage
      choosing good cache size

0.84
      update Etag info on 304 reply if possible
      Allow client side persistent connection for 304 reply
      -fastrefresh sets max age 1 day
      GC: do not apply multiple modifiers to object when doing GC, allow
        better finetuning
        GC: prekontrolovat aby se pokud mozno nepouzivaly nasobitele vicekrat
      UI: dodelat missing <title> u odpovedi
      barvicky pro refresh, add
      psat url u chyb odpovedi
      do not update expire info if not known
      run makeheaders instead of gatewaying server 304 reply code.
      fixed bad headers on 304 reply from miscrosoft IIS5 and earlier
      more intelligent check for writeable filesystem, old failed on NW

0.85
      fixed bug in POSTs and keep-alive
      fixed NPE in webconnection.toString()
      disable keepalive for blocked post

0.86
      redir_file
      removed command redirect
      rewrite_file
      trace remap/redirect
      visible link shown in UI
      UI: handle numberformatexceptions in all cases
      UI: quote next, prev.
      UI: some strings in HTML gets quoted
      Generate Etag header on auto decompressed data also.
      Fixded bug which prevents from sending Etag to client in most cases. (SCACHE uses Etag internally)
      Zero sized reply is now handled as error.
      Allow client side persistent connection UP after errors generated by SC.
      Allow client side persistent connection UP after 304 reply msgs.
      Fixed typo which makes client side if-none-match work again.
      Server reply code is shown in trace response
      .released as Beta3.
      Do not retry persistent connection on network read timeout
      Exit if main directory can not be created
      -gc 8h
      timestring support 's' for seconds.
      improved check for root as cachedir
      make -fakegc info more accurate
      generate_lastmod made boolean. Value 2 never works in any browser.
      close file after sending data from cache (new bug in 0.82) ; fixes
      can not rename problems on windows.
      close file after sending data from cache on HEAD method.
      add commands trace_remap trace_rewrite to .cnf and -notrace
      handle HEAD requests correctly when refreshing or loading objects.
      ftp_proxy support
      fixed crash when access log file can not be created
      removed forgotten debug prints
      manual updated
      .released as Beta4.
      adding of proxy-connection headers to passthrough server replies. We
       need this because we are turning HTTP/1.1 into HTTP/1.0 response.
      send expires on passed 304 reply
      do not send stale cached entry if hide errors is false.
      Podpora Cache-Control: private, no-store, no-cache
      cache_private
      check for HTTP/1.1 and enable KA istead of checking for HTTP/1.0
       and disabling.
      podpora pro 100-Continue
      podpora pro 204-No content
      debian: delete logfiles on purge
      debian: purge only if not /usr/bin/smartcache exists
      debian: new logfile for weekly gc
      debian: corrected bad filename cookies.cnf
      added first historical SC announce in 1998.
      inputtimeout renamed to client_timeout and made timestring
      proxyreadtimeout renamed to read_timeout and made timestring
      keepalivetimeout renamed to pconn_timeout and made timestring
      new feature request_timeout (timestring) idea from squid
      .rc1
      retry 1 times every failed request, not just keepalive with timeout.
      close persistent connection when throwing out body reply.
      default_forward_for is now unset by default.
      max_aborted... made timestring
      remove Cache-Control: from response as well Pragma: no-cache
      final.
0.87
      BUG FIX: cacheable has now priority over cache-private
      UI: escape # in URL.
      changed word wrap in BG quote
      -fakegc reports how many bad files was deleted from cache.
      Report network error when headers read failed.
      quick_abort_min 16 b
      quick_abort_max 16 b
      quick_abort_pct 95
      timestring supports 'f' - fortnight
      timestring supports long titles like minute, hour, week, day, year, second
      reference_age je timestring
      min/max_ob_size je sizestring
      blocksize je sizestring
      avg dir size je sizestring
      cachesize je sizestring
      large/small obj penalty supports sizestrings
      corrected printDelta values for months and years.
      flag_check interval je timestring
      port remamed to http_port
      nocaching renamed to no_cache
      force_ims_on_reloads renamed to reload_into_ims
      cache_swap_<low|high>
      report transfer errors on direct request to client
      reuse keepalive connection when direct request has no data from client
      cache_size -> cache_swap_size
      min_download_size for dm online hook
      disable keepalive after trace and options reply
      handle io errors when loading body of non GET requests correctly
      reply_body_max_size  ok
      request_body_max_size ok
      max_cacheable_size   ok
      fixed error in webconnection.close()
      stop on SC generated errors during refresh object
      disable client keepalive on failed POST
      do not Exit if main directory can not be created, switch to readonly
       mode instead.
      .released as a1
      do not exit if port for UI can not be binded.
      DIRS counts are printed to stat.log
      stat.log analyzer v 0.1 added
      cacheroot renamed to cache_dir
      GC: do not crash on cachesize 0
      UI: escape backslash (Karl-Heinz)
      Removed throws IOException from scache.main and mgr.go (it was not needed)
      touch object when generating 403 too large reply
      cache_vary
      handling of Expires: header changed to rfc2616 14.21
      .made final
0.88      
      reset chunked encoding and ims status when sending object from cache if refresh failed after receiving headers from server.
      build system: when generating scache-latest.zip, remove not changed .class files - allows faster beta releases
      .released a1
      added shutdown CTRL-handler by Karl-Heinz for jdk > 1.3. Still jdk1.1 compatible.
      uses line.separator when generating logfiles.
      build system: generate scache-latest.diff.gz file by hand, not via CVS diff
      flush logs on shutdown
      .released a2
      added example large cache configuration
      stats.py: added ignore offline mode switch
      stats.py: increased max. time difference to 3m+10s
      mgr.save() is now synchonized
      reinit dircache hashtable when idle (frees memory)
      ignore empty request line (like Apache); needed for fixing bad
      POSTing clients on keepalive connection.
      .released a3
      removed debug prints from shutdown hook function
      UI: sent expires header in the past in reply
      .made final
      
0.89
      do not convert to lowercase on case-insensitive redirect/rewrite
      cacheobject.genTmp() is synchonized
      .a1
      remove all levels of empty directories during GC/killunref
      .a2
      repair: default type can be now set
      repair: mime table can be reset to empty
      repair: fixed argument processing for -i
      repair: can translate &amp; to &
      smart cache now accepts SPACES in URL. Some broken browsers do
       not encodes them as %20. Target server can still reject
       URL as invalid.
      changed compresed: message
      .a3
      ui_searchcache_minage
      ui_searchcachefactor => ui_searchcache_factor
      changed typo in welcome message

0.90
      fix corrupted logfiles
      support for Cache-Control: no-cache
      support for printime timestams on trace debug output
      v UI se nezpracuje URL s mezerama viz www.vaisnava.cz
      in rfail.cnf more than 1 regexp works
      clear_flags_on_shutdown

0.91
      use system new line separators when writing to loader or download
       machine queue
      write thread number to rename failed error messages
      UI: make URL longer in directory list and Date shorter.
      UI: link when removing url from queue
      UI: missing title when deleting from queue
      added support for max_cacheable_size in live streams
      TRACE message printed when we are removing outgoing c00kie.

0.92
      overwrite_by_redirect y/n
      podpora pro redirecty bez wildcards
      repair podporuje .rss
      scons build framework added
      fixed security hole by disabling forwarder code
      tar builds from gnuarch repo added

0.93
      overwrite by redirect documented
      -local switch now works
      303 return code supported
      allow refresh redirect time > min_refresh time
      Support for Expires: never
      Support for Expires: 1.1.1970
      Fixed crash caused by synchronize error in printDate

0.94
      Search cache is now saved to files with .tmp extension
      Fix typo in UI
      New defaults in gc.cnf
      Changed copyrights to GPLv2
      Fixed typo in idle connection cleanup
      Increased default timeout from 25 sec to 29 sec.
      JRE 1.5 is now required
      Replaced Vectors by ArrayList
      JRE 1.3 hack for shutdownhook removed
      Code cleaned up to conform Java 5.0 standards, deprecated methods are still
       used.
      dont crash on HTTP/1.0+ requests without URI
      Add support for save_noncacheable
      improve initial message from fake garbage collection, print user configured values instead
       of values used during fake gc.
      Use Java util.regex instead of gnu.rex
      multi line HTTP/1.1 headers are supported now
      Update SGML documentation, removed outdated references to Java 1.1
      switched stat counters to AtomicInteger
      Some regexps didnt work - solved with switch to java regex
      Dont try to create directory with * in name on windows machines