[wwwdocs] Make a number of links relative

[wwwdocs] Make a number of links relative

[Gerald Pfeifer]

This is the right thing in general, so that sites like www.gnu.org
that host a copy of our web pages do not link to gcc.gnu.org unless
necessary (for things like Bugzilla, mailing list archives,...).

And it saves us some http-to-https conversations.

Installed.

Gerald

Index: news.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/news.html,v
retrieving revision 1.140
diff -u -r1.140 news.html
--- news.html	27 Jun 2014 11:48:46 -0000	1.140
+++ news.html	27 Jun 2014 20:38:32 -0000
@@ -614,8 +614,7 @@
 
 <dt><b>May 13, 2004</b></dt>
 <dd>
-The <a href="http://gcc.gnu.org/projects/tree-ssa/">tree-ssa
-branch</a> has been <a
+The <a href="projects/tree-ssa/">tree-ssa branch</a> has been <a
 href="https://gcc.gnu.org/ml/gcc/2004-05/msg00679.html">merged into
 mainline</a>.
 </dd>
@@ -627,7 +626,7 @@
 
 <dt><b>February 25, 2004</b></dt>
 <dd>
-The <a href="http://gcc.gnu.org/projects/tree-ssa/">tree-ssa branch</a>
+The <a href="projects/tree-ssa/">tree-ssa branch</a>
 has been frozen to be incorporated into GCC 4.0.0.  Tree SSA
 incorporates two new high-level intermediate languages (GENERIC and
 GIMPLE), an optimization framework for GIMPLE based on the Static
Index: readings.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/readings.html,v
retrieving revision 1.233
diff -u -r1.233 readings.html
--- readings.html	31 Oct 2013 18:03:28 -0000	1.233
+++ readings.html	27 Jun 2014 20:38:32 -0000
@@ -138,7 +138,7 @@
    <br />Manufacturer: Renesas
    <br />Exact chip name: H8/300
    <br />GDB includes a simulator.
-   <br /><a href="http://gcc.gnu.org/projects/h8300-abi.html">H8/300
+   <br /><a href="projects/h8300-abi.html">H8/300
          Application Binary Interface for GCC</a>.
  </li>
  
Index: projects/beginner.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/beginner.html,v
retrieving revision 1.58
diff -u -r1.58 beginner.html
--- projects/beginner.html	27 Jun 2014 15:04:40 -0000	1.58
+++ projects/beginner.html	27 Jun 2014 20:38:57 -0000
@@ -98,7 +98,7 @@
 
 <li>Perform additional GCC testing.
 
-<p>See <a href="http://gcc.gnu.org/testing/">GCC Testing Efforts</a>
+<p>See <a href="../testing/">GCC Testing Efforts</a>
 for ideas and information about what's already being done.</p>
 </li>
 
Index: projects/ia64.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/ia64.html,v
retrieving revision 1.22
diff -u -r1.22 ia64.html
--- projects/ia64.html	27 Jun 2014 15:04:40 -0000	1.22
+++ projects/ia64.html	27 Jun 2014 20:38:58 -0000
@@ -119,7 +119,7 @@
 is available through <code>-fbranch-probabilities</code>
 using data generated by first compiling with <code>-fprofile-arcs</code>.
 This is described in
-<a href="http://gcc.gnu.org/news/profiledriven.html">Infrastructure for
+<a href="../news/profiledriven.html">Infrastructure for
 Profile Driven Optimizations</a>, which also lists items for future work.</p>
 
 <p>The following items came out of the June 2001 summit as issues to