Add myself (Bob Peterson) as a maintainer of GFS2

This patch adds Bob Peterson as a maintainer of the GFS2 file system.
It also changes the development repository to a shared location rather
than Steve Whitehouse's private location.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>

MAINTAINERS

@@ -4307,10 +4307,10 @@ F:	scripts/get_maintainer.pl
 
 GFS2 FILE SYSTEM
 M:	Steven Whitehouse <swhiteho@redhat.com>
+M:	Bob Peterson <rpeterso@redhat.com>
 L:	cluster-devel@redhat.com
 W:	http://sources.redhat.com/cluster/
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes.git
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw.git
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
 S:	Supported
 F:	Documentation/filesystems/gfs2*.txt
 F:	fs/gfs2/