Version Control With Subversion Source

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.

* src/en/book/ch02-basic-usage.xml
(svn.tour.treeconflicts): Mention that "svn info" prints the left and
right URLs of a tree conflict victim.

* www/index.fr.html,
* www/index.de.html,
* www/index.en.html
Lose trailing pipe separator (|) character at end of translation list.

* www/index.de.html,
* www/index.en.html,
* www/index.es.html,
* www/index.fr.html,
* www/index.it.html,
* www/index.ja.html,
* www/index.pt_BR.html,
* www/index.ru.html,
* www/index.zh.html
Sync the translation link sets up again.

* www/index.nb.html
Sync the translation link sets up again. Also, remove <base> tag.

Patch by: Wolf Peuker <wolfpeuker{_AT_}googlemail.com>
(Tweaked by me.)

Improving French style :
- passage au présent si possible
- typographie
- Subtantifs pour les titres

Translation to French of chapter 5 : done.