Version Control With Subversion Source

Fix a typo reported in issue #10 by diajun@...

Fix a typo reported in issue #14 by hamaryns@...

* trunk/src/de/book/ch04-branching-and-merging.xml
- Ticket #171 (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch04-branching-and-merging.xml
- Ticket # 170 (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch04-branching-and-merging.xml
- Tickets ## 168--169 (cf. http://www.svnbook.de/report/6).
- Expanded tabs.

In the synopsis of "svnadmin dump", add the missing "--deltas" option.

Patch by: ycdtosa <ycdtosa@...>

* src/en/book/ch09-reference.xml
(svn.ref.svnadmin.c.dump): Add "--deltas" in the synopsis.

* trunk/src/de/book/ch06-server-configuration.xml
- Fixed quote tag.

* src/de/book/ch06-server-configuration.xml
- Integrated patch of Dirk Abe (Patch #196
for http://www.svnbook.de)

* src/tools/bin/spew-svn-command-options.sh
Rename to...

* src/tools/bin/spew-svn-command-options
...this, and rework this script to print a consistent,
alphabetically sorted list of long options supported by various bits
of the Subversion toolchain. The goal, of course, being output that
is 'diff'able from version to version.

Update documentation of credential caching behaviour.

* src/en/book/ch03-advanced-topics.xml
(svn.serverconfig.netmodel.credcache): Remove references to
implementation details of the auth cache which are repeated
further down below anyway (and they didn't hold for all
systems either, e.g. Mac OS X).
Expand notes on UNIX-like systems about new support for
GNOME Keyring and KDE Wallet, and explain the new default
behaviour of prompting the user before caching passwords
unencrypted. Expand a bit on the assumptions behind
security of file system permissions.

* src/en/book/ch02-basic-usage.xml
(svn.tour.initial.disabling-password-caching): Document
the new default behaviour of prompting the user before
caching passwords unencrypted, and explain how to
enable and disable plaintext caching by default.

Remove a footnote arguing that plaintext caching was
OK because "you can't really delete anything from
Subversion". This argument is misleading because it does
not cover the entire problem space. E.g. adding something
can also cause trouble -- see the obliterate discussion.
And I don't think having the book argue in favour of either
way is a good idea in the first place. Let's let our users
make up their own minds. Now that we're truly giving them the
necessary knobs to tweak, we can stay out of this discussion.

* src/en/book/ch07-customizing-svn.xml
(svn.advanced.confarea.opts.servers): Document the new
"store-plaintext-passwords" option. Also, add a TODO
note regarding GNOME Keyring and KDE Wallet.