cgroups: make messages more readable

Fix some cgroup messages to read better.
Update MAINTAINERS to include mm/*cgroup* files.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 2f5cf3d..5b7a08d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1544,6 +1544,7 @@
 S:	Maintained
 F:	include/linux/cgroup*
 F:	kernel/cgroup*
+F:	mm/*cgroup*
 
 CORETEMP HARDWARE MONITORING DRIVER
 P:	Rudolf Marek