MAINTAINERS: update Ceph and RBD maintainers

- add Ilya, drop Yehuda as an RBD maintainer
- add Zheng as a Ceph maintainer
- update Yehuda and Sage's emails

Signed-off-by: Sage Weil <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index d66a97d..9d64a6f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2405,7 +2405,8 @@
 F:	arch/powerpc/platforms/cell/
 
 CEPH DISTRIBUTED FILE SYSTEM CLIENT
-M:	Sage Weil <[email protected]>
+M:	Yan, Zheng <[email protected]>
+M:	Sage Weil <[email protected]>
 L:	[email protected]
 W:	http://ceph.com/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
@@ -7884,8 +7885,8 @@
 F:	drivers/media/parport/*-qcam*
 
 RADOS BLOCK DEVICE (RBD)
-M:	Yehuda Sadeh <[email protected]>
-M:	Sage Weil <[email protected]>
+M:	Ilya Dryomov <[email protected]>
+M:	Sage Weil <[email protected]>
 M:	Alex Elder <[email protected]>
 M:	[email protected]
 W:	http://ceph.com/