Update my contact address as the maintainer.

Author: gitster

Documentation/SubmittingPatches

@@ -31,7 +31,8 @@ Checklist (and a short version for the impatient):
 	  corrupt whitespaces.
 	- provide additional information (which is unsuitable for
 	  the commit message) between the "---" and the diffstat
-	- send the patch to the list _and_ the maintainer
+	- send the patch to the list (git@vger.kernel.org) and the
+	  maintainer (gitster@pobox.com).
 	- if you change, add, or remove a command line option or
 	  make some other user interface change, the associated
 	  documentation should be updated as well.

Documentation/git.txt

@@ -476,7 +476,7 @@ include::core-intro.txt[]
 Authors
 -------
 * git's founding father is Linus Torvalds <torvalds@osdl.org>.
-* The current git nurse is Junio C Hamano <junkio@cox.net>.
+* The current git nurse is Junio C Hamano <gitster@pobox.com>.
 * The git potty was written by Andres Ericsson <ae@op5.se>.
 * General upbringing is handled by the git-list <git@vger.kernel.org>.