Version Control With Subversion Source

* en/book/ch09-reference.xml
Mostly minor markup/wording fixes, but also give an example of 'svn
delete --keep-local'.

Close issue #75 'ch04: svn merge --reintegrate does not match
any of the 3 usage patterns' and issue #134 'ch09: merge
reference should mirror changes made to 'svn merge --help'
text in 1.7'.

* en/book/ch09-reference.xml

(svn.ref.svn.sw): Note --ignore-ancestry's rather important
effect on 'svn merge' beyond what it shares with 'svn diff'.

(svn.ref.svn.c.merge): Rework 'svn merge' reference to more
closely track the revised 'svn merge --help' text for 1.7.

* /branches/1.5/de/book/ch06-server-configuration.xml:
Translation of "SSH configuration tricks". Closes ticket #315 (cf.
http://www.svnbook.de/ticket/315),

* en/book/ch09-reference.xml
(svn.ref.svn.c.cat): Eliminate a truly forced example. Add
admonishment of a common mistake folks make.

* en/book/ch09-reference.xml
(svn.ref.svn.c.blame): Demonstrate how to ignore whitespace-only
changes with 'svn blame'.

Fix issue #152 ("Prefer 'svn patch' over 'patch' in book recommendations").

* en/book/ch02-basic-usage.xml,
* en/book/ch04-branching-and-merging.xml
Note 'svn patch' in places where 'patch' is also mentioned, and use
'svn patch' instead of 'patch' in examples.

* en/book/ch04-branching-and-merging.xml
Edits from my read-thru of Chapter 4 (including the removal of the
seemingly unnecessary zone="" attribute found on some <indexterm>
tags...)

Fix issue #114 'Consider re-adding pre-merge-tracking
examples'.

* en/book/ch04-branching-and-merging.xml
(svn.branchemerge.basicmerging.stayinsync): Add a new
sidebar 'Keeping a Branch in Sync Without Merge Tracking'.

Wrap-up my chapter 4 final read through review.

* en/book/ch04-branching-and-merging.xml
(svn.advanced.vendorbr,
svn.advanced.vendorbr.svn_load_dirs): Some minor wording tweaks.

* en/book/ch04-branching-and-merging.xml
(svn.branchmerge.tags.mkcomplex): Account for the current state
of the art in 'svn diff' and 'svn patch'.