Version Control With Subversion Source

of repository converters. Patch by Toby Johnson <toby@...>.

* doc/book/book/appc.xml
(svn-ap-c-sect-3.1): Add more info about the Windows XP WebFolders shortcut
bug and a suggested workaround.

* doc/book/book/appd.xml:
(svn-ap-d-sect-1): Fix comment on Section 1 to correct title.
(svn-ap-d-sect-3): Add reference to vss2svn.tigris.org under "Repository
Converters".