Version Control With Subversion Source

* en/stylesheets/custom-html-stylesheet.xsl
Bump custom footer text to refer to version 1.7 instead of 1.6.

Finish issue #22 ("1.7 change: authz section headers are now compared
case-sensitively").

* en/book/ch06-server-configuration.xml
Add a warning about how pre-1.7 Subversion used case-insensitive
comparisons for authz section headers, encourage folks who upgraded
older installations to review their access files.

* branches/1.6/en/book/ch06-server-configuration.xml
Re-add a warning (originally added in r3897 for issue #22) that was
inadvertantly clobbered in r3902.

* en/book/ch07-customizing-svn.xml
Followup to r4006, replacing 'svn diff' output with the 1.7 flavor
instead of 1.6. (Brain's still stuck in "1.6 documentation" mode, I
guess.)

Reported by: danielsh

Finish issue #36 ("Document auto-props escape syntax (;;)").

* en/book/ch07-customizing-svn.xml
(svn.advanced.confarea.opts.config): Document the semicolon escape
trick for autoprops, and show a practical example of them in use.

* en/book/ch09-reference.xml
Minor wording tweaks.

For Issue 59 ("'svnsync init' supports a --allow-non-empty flag in
Subversion 1.7"):

* en/book/ch09-reference.xml
Note the new 'svnsync initialize --allow-non-empty' option with a
brief description of its utility.

* en/prep-book-for-oreilly
* en/REVIEW
* en/ID-REMAP
Remove some ancient, unused stuff.

Followup to r3991, this time removing the draft-mode setting for the
FO (PDF, PS) output formats, too.

Finish Issue 116 ("1.7 change: 'svn update' prints a header line").

* en/book/ch09-reference.xml
* en/book/ch04-branching-and-merging.xml
Finish (I think) updating 'svn update' example output.