[wwwdocs] Clean up some references to cvs.html

[Gerald Pfeifer <gerald at pfeifer dot com>]

In http://gcc.gnu.org/PR54711 Andrew wrote the following:

  >> I am not sure where the sources
  >> for the web pages are.  Are they in the GCC source tree somewhere?
  > Weird, IIRC instructions used to be on the write-access page.
  > Gerald?
  They are on the cvs.html page:
  http://gcc.gnu.org/cvs.html

  I don't know if they are linked from anywhere though.

Planning to simplify/improve things partly based on that thread,
I noticed that we actually have too many references to that page,
so before I proceed with the other changes, this one cleans things
up a bit (and reduces the number of direct references we have to
CVS or Subversion).

Applied.

Gerald


Index: projects/beginner.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/beginner.html,v
retrieving revision 1.56
diff -u -3 -p -r1.56 beginner.html
--- projects/beginner.html	20 Sep 2009 21:25:28 -0000	1.56
+++ projects/beginner.html	29 Dec 2012 00:22:58 -0000
@@ -22,7 +22,7 @@ you have <em>no</em> programming skills,
 href="documentation.html">help with documentation</a> or with the <a
 href="http://gcc.gnu.org/bugzilla/";>bug database</a>.</p>
 
-<p>We assume that you already know how to <a href="../cvs.html">get the
+<p>We assume that you already know how to <a href="../svn.html">get the
 latest sources</a>, configure and build the compiler, and run the test
 suite.  You should also familiarize yourself with the
 <a href="../contribute.html">requirements for contributions</a> to GCC.</p>
Index: projects/cfo.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/cfo.html,v
retrieving revision 1.8
diff -u -3 -p -r1.8 cfo.html
--- projects/cfo.html	30 Dec 2008 10:04:46 -0000	1.8
+++ projects/cfo.html	29 Dec 2012 00:22:58 -0000
@@ -28,8 +28,7 @@
 added. To do list published.
 </p></dd>
 <dt>2004-11-16</dt>
-<dd><p>The branch is now open. Checkout the cfo-branch branch by following the
-instructions found in the <a href="../cvs.html">CVS documentation</a>.
+<dd><p>The branch is now open.
 </p></dd>
 </dl>
 
@@ -45,8 +44,8 @@ algorithms). The implementation currentl
 
 <h2><a name="contributing">Contributing</a></h2>
 
-<p>Checkout the cfo-branch branch following the instructions found in the 
-<a href="../cvs.html">CVS documentation</a>.</p>
+<p>Checkout the cfo-branch branch from
+<a href="../svn.html">our respository</a>.</p>
 
 <p>When posting to the development lists, please mark messages and patches with
 [cfo] in the subject. The usual contribution and testing rules apply. This
Index: projects/cxx-reflection/index.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/cxx-reflection/index.html,v
retrieving revision 1.4
diff -u -3 -p -r1.4 index.html
--- projects/cxx-reflection/index.html	25 Aug 2003 14:02:36 -0000	1.4
+++ projects/cxx-reflection/index.html	29 Dec 2012 00:22:58 -0000
@@ -22,8 +22,7 @@ constrained genericity in C++.</p>
 <h3>Contributing</h3>
 
 <p>Checkout the <code>cxx-reflection-branch</code> branch
-following the instructions found in the <a href="../../cvs.html">CVS
-documentation</a>.</p> 
+in <a href="../svn.html">our respository</a>.</p>
 
 <p>When posting to the development lists, please mark messages and patches with
 <code>[cxx-reflection]</code> in the subject.  As this is a branch, and not
Index: projects/tree-ssa/index.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/tree-ssa/index.html,v
retrieving revision 1.41
diff -u -3 -p -r1.41 index.html
--- projects/tree-ssa/index.html	25 Apr 2009 22:58:23 -0000	1.41
+++ projects/tree-ssa/index.html	29 Dec 2012 00:22:59 -0000
@@ -78,8 +78,7 @@ href="http://gcc.gnu.org/wiki/GettingSta
 <h3><a name="contributing">Contributing</a></h3>
 
 <p>Checkout the <code>tree-ssa-20020619-branch</code> branch
-following the instructions found in the <a
-href="../../cvs.html">CVS documentation</a>.</p>
+in <a href="../../svn.html">our respository</a>.</p>
 
 <p>All contributions to the branch must also comply with the
 requirements detailed in the <a