Version Control With Subversion Source

* ch06.xml: oops, fix duplicated section number.

Finish "new" chapter 6 in book.

* ch06.xml: document SSL certificate features, and all of mod_authz_svn.

* ch06.xml: continue book work.

More book work.

* ch05.xml: remove two sections, "Networking a repository" and
"Repository permissions", since it's all been moved into ch06 now.

* ch06.xml: fill out the httpd outline with text that used to live in
ch05, add extra TODO notes for self.

* ch06.xml: finish documenting 'svnserve'... to death.

More book work: saving progress.

* ch06.xml: finish most of the 'svnserve' documentation. hoo.

More book work: saving progress.

* ch06.xml: start documenting 'svnserve' fully.

Continue book work.

* ch02.xml (Repository URLs): fix descriptions of svn:// and svn+ssh://.

* ch07.xml: rename 'store-password' config var to 'store-auth-creds'.

* ch06.xml: fill out the cred-caching section.

More book work.

* doc/book/book/ch00.xml: rewrite the overview of the book's chapters,
based on feedback from Ben Gross.

* doc/book/TODO: mark this task finished.

* doc/book/book/ch06.xml: add some notes.

* doc/book/book/ch06.xml: create chapter outline, ready to fill in.