if admin wants to be informed of changes of address

[Jidanni]

Users are allowed to change their addresses all behind the back of the
administrator, as apparently the closest button governing this is
admin_notify_mchanges which doesn't track changes of address. So in
case the administrator is interested in such mundane news, he can only
check Membership Management often.
(Only have web interface here. No shell.)

[http://sourceforge.net/tracker/index.php?func=detail&aid=1878090&group_id=103&atid=100103]