Version Control With Subversion Source

* tools/Makefile.base-rules:
Allow fetching of DTDs over the network. This allows those of
us on systems (e.g. Cygwin on Windows) that don't have the DTDs
readily available to build the book.

Suggested by: cmpilato

For issue 5 ("Document svnmucc"), begin fleshing out the reference
material for svnmucc.

* en/book/ch09-reference.xml
(svn.ref.svnmucc): Document svnmucc's Actions and Options in new
subsections of this section. Leave a placeholder section for
Examples, too.

* en/book/ch03-advanced-topics.xml
(svn.advanced.working-without-a-wc.svnmucc): Point out that svnmucc
can make all the changes that svn can make. Add a warning box
about the need for specifying a base revision, and update examples
to show that being done.

Suggested by: d.s{__AT__}daniel.shahaf.name
markus.kuhn

Document new --show-inherited-props option for
'svnlook (pg|pl)' subcommands.

* en/book/ch09-reference.xml

(svn.ref.svnlook.sw): Add
svn.ref.svnlook.sw.show_inherited_props to valid
svnlook options.

(svn.ref.svnlook.c.propget,
svn.ref.svnlook.c.proplist): Add --show-inherited-props
as a valid option and give brief examples.

Add a section on generic property inheritance.

* en/book/ch03-advanced-topics.xml
(svn.advanced.props.inheritable): Add content to what was
previously just a stub.

* en/book/ch06-server-configuration.xml
Point to the canonical homepage for ViewVC.

Reported by: gstein

* en/book/ch06-server-configuration.xml
Fix a spelling oops and some ambiguously phrased prose.

Reported by: d.s{__AT__}daniel.shahaf.name

Finish Issue 3 ("Add documentation for running svnserve under
xinetd").

* en/book/ch06-server-configuration.xml
(svn.serverconfig.svnserve.invoking.xinetd): New section.

Content by: Zdenek Wagner <zdenek.wagner{__AT__}gmail.com>
(Tweaked by me.)

Fix issue84 ("fr-current Title missing").

* 1.5/fr/book/ch04-branching-and-merging.xml
Add missing section divider/title.

Reported by: oXidFoX

* en/book/ch02-basic-usage.xml
(svn.tour.importing.naming): Warning about how different OSes
allow/disallow certain path names, and recommend that users put some
thought into such things.