Version Control With Subversion Source

Sync the Norwegian book against the English files, r1544:1569.

* src/nb/LAST_UPDATED
Updated by make sync as usual.

* src/nb/book/appb.xml
Updated r1555.

* src/nb/book/ch09.xml
Updated r1551, r1563, r1568.

Party time in the Norwegian section, the book is now more Norwegian than
English — 50.46% translated. One pint of Guinness, please.

* src/nb/TRANSLATION-STATUS
ch06.xml to 87%.

* src/nb/book/ch06.xml
(svn.serverconfig.httpd.authz): Translated subsection.

* src/en/book/ch09.xml (svn.ref.svn.c.info): 'svn info' now *may*
contact the repository. Error found by Simon Large
(simon@...).

* www/index.ru.html: translated to Russian title page

* www/index.es.html
* www/index.html.var
* www/index.it.html
* www/index.nb.html
* www/index.en.html
Link to index.ru.html is added

* ru/sync.py
* ru/Makefile
Are changed, that on a title page of the book would
be shown both revision of translation and revision on
which translation is based

* ru/TRANSLATION-STATUS: 2% -> 20% for ch04.xml

* ru/book/ch04.xml
Translated svn.branchmerge.using.create, svn.branchmerge.using.work and
svn.branchmerge.using.concepts

New approach to synchronization of translation with English text.
Revision number with which is synchronized translation is
underlined separately for each file (using <edition></edition>).
For this purpose is in appropriate way modified sync.py.

* sync.py
* Makefile
Changed under the new approach to synchronization

* LAST_UPDATED: removed as superfluous

* ru/book/appa.xml
* ru/book/appb.xml
* ru/book/appc.xml
* ru/book/foreword.xml
* ru/book/ch00.xml
* ru/book/ch01.xml
* ru/book/ch02.xml
* ru/book/ch03.xml
* ru/book/ch04.xml
* ru/book/ch05.xml
* ru/book/ch06.xml
* ru/book/ch07.xml
* ru/book/ch08.xml
* ru/book/ch09.xml
Sync with en/

* src/en/book/ch09.xml (svn lock): fix <screen> junk.

Removed some old Norwegian stuff from when we lived in the Subversion
repository.

* src/nb/TRANSLATION-STATUS: There’s no misc-docs/* files here anymore.

Edit the Norwegian documentation a bit.

* src/nb/METHOD: Various changes.