Version Control With Subversion Source

Fix Issue 77: Typo about a Microsoft Update

* src/en/book/appc-webdav.xml
Fix reference to Microsoft Knowledge Base article ID.

Found by: christophe.nanteuil

Translation to French of Chapter 8 : done.

Cross-reading of French translation of Chapter 2
Fix address of Subversion code source in Chapter 6

Translation to French of Appendix B : done.

* src/fr/book/ch01-fundamental-concepts.xml
- Fix Typo

* www/index.fr.html
- Fix Typo

Translation to French of Chapter 6 : done.

* src/en/book/ch04-branching-and-merging.xml
(svn.branchemerge.basicmerging.reintegrate): Link to
svn.branchmerge.advanced.reintegratetwice from here, to ensure
awareness of the alternative to deleting a reintegrated branch.

Suggested by: Jacob Weber

* src/en/book/ch06-server-configuration.xml
(svn.serverconfig.svnserve.sshtricks.fixedcmd): Use correct name of SSH
authorized_keys file. Pointed out by Christophe Nanteuil, thanks!

* src/en/book/ch04-branching-and-merging.xml
(svn.branchmerge.advanced.reintegratetwice): Wording tweak; s/X/revision X/

* src/en/book/ch04-branching-and-merging.xml
(svn.branchmerge.basicmerging.reintegrate): Put the reintegrate merge
into a separate section so we can xref it.
(svn.branchmerge.advanced.reintegratetwice): By popular demand, add
a new advanced merging section explaining how to continue using a
reintegrated branch without deleting and re-creating it.