Change man-pages maintainer address

The email address that I use for man-pages maintenance has changed as of
now.  This patch changes the address in Documentation/HOWTO and
MAINTAINERS.

Signed-off-by: Michael Kerrisk <mtk.manpages@googlemail.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 38d11f6..10deabe 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2486,7 +2486,7 @@
 
 MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
 P:	Michael Kerrisk
-M:	mtk-manpages@gmx.net
+M:	mtk.manpages@gmail.com
 W:	ftp://ftp.kernel.org/pub/linux/docs/manpages
 S:	Maintained