Version Control With Subversion Source

Add some placeholders for undocumented runtime configuration options.

Various smallish fixes for chapter 5.

Finish my tasks for book drop.

* src/en/book/ch06-server-configuration.xml: finish webdav-proxy stuff.

* src/en/book/ch05-repository-admin.xml: tweak output of 'svnsync sync'.

Add sections 'Moving and Removing Repositories' and 'Managing
Repository UUIDs', and update some overlapping text with the
appropriate cross-references.

Dizionario-IT-EN.cliplibrary:
replaced:
open source=| with: open-source=|
and:
subversion client=client subversion with: subversion-client=client subversion

Changed title from 'Introduzione' to 'Prefazione'
Modified title capitalization in 'Come leggere questo libro'
replaced 'gestione delle versioni' with 'controllo di versione'
some italian grammar fixes
changed translation of command-line

Finish updating the command line reference for Subversion 1.5.

Fixes issue #43.

* src/en/book/ch09-reference.xml (svn.ref.svn): Look! A CHRISTMAS
card shaped like a SYLLOGISM!

Update part of the command line reference for Subversion 1.5. From
svn add to svn merge (inclusive).

More to come.

Fixes part of issue #43.

* src/en/book/ch09-reference.xml (svn.ref.svn): My ham RADIO smells
like PORCUPINES!

Update part of the command line reference for Subversion 1.5. From
svn add to svn merge (inclusive).

More to come.

Fixes part of issue #43.

* src/en/book/ch09-reference.xml (svn.ref.svn): My ham RADIO smells
like PORCUPINES!

* ch06-server-configuration.html: sketch outline of write-thru-proxy docs.