Sanitize some bugzilla referrences that break one of my script.

s/BZ/PR/
Remove ":" between PR and bug number

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1923174 13f79535-47bb-0310-9956-ffa450edef68

Author: Christophe Jaillet

CHANGES

@@ -22,7 +22,7 @@ Changes with Apache 2.4.63
      in the host name or port. PR 69233. [Yann Ylavic]
 
   *) mod_log_config: Fix merging for the "LogFormat" directive.
-     PR: 65222. [Michael Kaufmann <mail michael-kaufmann.ch>]
+     PR 65222. [Michael Kaufmann <mail michael-kaufmann.ch>]
 
   *) mod_lua: Make r.ap_auth_type writable.  PR 62497.
      [Michael Osipov <michaelo apache.org>]
@@ -57,7 +57,7 @@ Changes with Apache 2.4.63
      [Ruediger Pluem, Eric Covener]
 
   *) Windows: Restore the ability to "Include" configuration files on UNC
-     paths. PR69313 [Eric Covener]
+     paths. PR 69313 [Eric Covener]
 
   *) mod_proxy: Avoid AH01059 parsing error for SetHandler "unix:" URLs
      in <Location> (incomplete fix in 2.4.62). PR 69160. [Yann Ylavic]
@@ -225,7 +225,7 @@ Changes with Apache 2.4.60
      Credits: Marc Stern (<marc.stern AT approach-cyber.com>)
 
   *) mod_proxy: Fix DNS requests and connections closed before the
-     configured addressTTL.  BZ 69126.  [Yann Ylavic]
+     configured addressTTL.  PR 69126.  [Yann Ylavic]
 
   *) core: On Linux, log the real thread ID in error logs.  [Joe Orton]
 
@@ -1431,7 +1431,7 @@ Changes with Apache 2.4.48
      [Yann Ylavic]
 
   *) mod_proxy: Fix flushing of THRESHOLD_MIN_WRITE data while tunneling.
-     BZ 65294.  [Yann Ylavic]
+     PR 65294.  [Yann Ylavic]
 
   *) core: Fix a regression that stripped the ETag header from 304 responses.
      PR 61820 [Ruediger Pluem, Roy T. Fielding]