[listdc++ doc] Refer to GDB instead of gdb and fix link

[Gerald Pfeifer]

On Tue, 1 Feb 2011, Gerald Pfeifer wrote:
> A small documentation change.  I committed this to mainline and
> plan on backporting later...

This is the version I just applied on the GCC 4.5 branch.  It is
basically the same, except for a different syntax to mark up links
being used in this version of the libstdc++ manual.

Gerald

2011-02-06  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/debug.xml: Use GDB instead of gdb.
	Adjust link to GDB manual.

Index: doc/xml/manual/debug.xml
===================================================================
--- doc/xml/manual/debug.xml	(revision 169867)
+++ doc/xml/manual/debug.xml	(working copy)
@@ -45,7 +45,7 @@
   communicate information about source constructs can be changed via
   <code>-gdwarf-2</code> or <code>-gstabs</code> flags: some debugging
   formats permit more expressive type and scope information to be
-  shown in gdb. Expressiveness can be enhanced by flags like
+  shown in GDB. Expressiveness can be enhanced by flags like
   <code>-g3</code>. The default debug information for a particular
   platform can be identified via the value set by the
   PREFERRED_DEBUGGING_TYPE macro in the gcc sources.
@@ -197,14 +197,14 @@
   </para>
 
 <para>
-  Many options are available for gdb itself: please see <ulink
-  url="http://sources.redhat.com/gdb/current/onlinedocs/gdb_13.html#SEC125">
-  "GDB features for C++" </ulink> in the gdb documentation. Also
+  Many options are available for GDB itself: please see <ulink
+  url="http://sources.redhat.com/gdb/current/onlinedocs/gdb/">
+  "GDB features for C++" </ulink> in the GDB documentation. Also
   recommended: the other parts of this manual.
 </para>
 
 <para>
-  These settings can either be switched on in at the gdb command line,
+  These settings can either be switched on in at the GDB command line,
   or put into a .gdbint file to establish default debugging
   characteristics, like so:
 </para>