MAINTAINERS: Promote NBD to supported, with new maintainer

We are promising more than just odd fixes, and Paolo is hoping
to offload the pull requests to me.  Also, enough of NBD is related
to the block layer that it is worth including qemu-block on patches.

While at it, include blockdev-nbd.c and qemu-nbd.texi in the set
of maintained files.
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <20170707182151.29872-1-eblake@redhat.com>
Acked-by: NPaolo Bonzini <pbonzini@redhat.com>

MAINTAINERS

@@ -1348,15 +1348,6 @@ W: http://info.iet.unipi.it/~luigi/netmap/
 S: Maintained
 F: net/netmap.c
 
-Network Block Device (NBD)
-M: Paolo Bonzini <pbonzini@redhat.com>
-S: Odd Fixes
-F: block/nbd*
-F: nbd/
-F: include/block/nbd*
-F: qemu-nbd.c
-T: git git://github.com/bonzini/qemu.git nbd-next
-
 NUMA
 M: Eduardo Habkost <ehabkost@redhat.com>
 S: Maintained
@@ -1710,6 +1701,18 @@ S: Supported
 F: block/iscsi.c
 F: block/iscsi-opts.c
 
+Network Block Device (NBD)
+M: Eric Blake <eblake@redhat.com>
+M: Paolo Bonzini <pbonzini@redhat.com>
+L: qemu-block@nongnu.org
+S: Maintained
+F: block/nbd*
+F: nbd/
+F: include/block/nbd*
+F: qemu-nbd.*
+F: blockdev-nbd.c
+T: git git://repo.or.cz/qemu/ericb.git nbd
+
 NFS
 M: Jeff Cody <jcody@redhat.com>
 M: Peter Lieven <pl@kamp.de>