aoe: update aoe maintainer information

The coraid.com email address is defunct.  The old aoe support area hosted
at coraid.com is no longer up.  These changes update the email and website
to current ones.

Signed-off-by: Ed Cashin <ed.cashin@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>