Version Control With Subversion Source

Fix issue #149 ("The count of Keywords specified in text doesn't match
number of Keywords listed").

* en/book/ch03-advanced-topics.xml
Remove specific (and wrong) number of available keywords.

Reported by: harry.pehkonen

For issue #121 ("1.7 change: copy-on-update code removed").

* en/book/ch02-basic-usage.xml
(svn.tour.treeconflicts.example): Rework this section a bit for
clarity, for updated output from Subversion 1.7 binaries, and to
not depend on Subversion applying edits atop of moved file
automatically (since we removed that logic in Subversion 1.7).

Finish issue #117 ("1.7 change: New 'svn patch' subcommand").

* en/book/ch09-reference.xml
(svn.ref.svn.c.patch): Flesh out this section.

Finish issue #137 ("1.7 change: svn diff now shows textual property
changes in unidiff format, except for svn:mergeinfo properties").

* en/book/ch03-advanced-topics.xml
(svn.advanced.props.workflow): Update sample output from 'svn diff',
and massage wording about how properties are represented to include
a mention of 'svn patch' and its utility here.

* en/book/ch09-reference.xml
(svn.ref.svn.c.patch): New placeholder section.

* en/book/ch06-server-configuration.xml
(Server Optimization): New section.

* en/book/ch09-reference.xml
Document the new --cache-fulltexts, --cache-txdeltas, --compression,
--memory-cache-size, --prefer-ipv6, and --quiet options to svnserve.

Merge from ^/trunk/en r4054, which just added some missing divider
comment lines.

Add missing divider lines.

Merge from ^/trunk/en r4052, which adds a note in the reference about
'svn update --set-depth' (with a pointer to the Sparse Directories
section).

* en/book/ch09-reference.xml
Note that 'svn update --set-depth' is the primary way that sparse
directories are managed, and point to that book section.

* en/book/ch09-reference.xml
More reference updates for Subversion 1.7.