Merge pull request #1349 from joto/help-man

Various cleanups on help texts etc

Author: lonvia

docs/osm2pgsql.1

@@ -169,7 +169,8 @@ greatly increased.
 .RE
 .TP
 .B \-\-drop
-Drop the slim mode tables from the database once the import is complete.
+Drop the slim mode tables from the database and the flat node file once
+the import is complete.
 This can greatly reduce the size of the database, as the slim mode
 tables typically are the same size, if not slightly bigger than the main
 tables.
@@ -223,9 +224,9 @@ This is the default and should be typically used.
 .RE
 .TP
 .B \-x, \-\-extra\-attributes
-Include attributes for each object in the database.
-This includes the username, userid, timestamp and version.
-Note: this option also requires additional entries in your style file.
+Include attributes of each object in the middle tables and make them
+available to the outputs.
+Attributes are: user name, user id, changeset id, timestamp and version.
 .RS
 .RE
 .TP

docs/osm2pgsql.md

@@ -126,7 +126,7 @@ mandatory for short options too.
     will likely be greatly increased.
 
 \--drop
-:   Drop the slim mode tables from the database once the import is complete. This can
+:   Drop the slim mode tables from the database and the flat node file once the import is complete. This can
     greatly reduce the size of the database, as the slim mode tables typically are the same
     size, if not slightly bigger than the main tables. It does not, however, reduce the
     maximum spike of disk usage during import. It can furthermore increase the import speed,
@@ -159,9 +159,9 @@ mandatory for short options too.
     default and should be typically used.
 
 -x, \--extra-attributes
-:   Include attributes for each object in the database.
-    This includes the username, userid, timestamp and version.
-    Note: this option also requires additional entries in your style file.
+:   Include attributes of each object in the middle tables and make them
+    available to the outputs. Attributes are: user name, user id, changeset id,
+    timestamp and version.
 
 \--flat-nodes=FILENAME
 :   The flat-nodes mode is a separate method to store slim mode node information on disk.