send-email: Update regex parsing for pine aliases
send-email: Update regex parsing for pine aliases

The pine address book format is tab seperated and the first field
is the nickname/alias and the third field is the email address as
per:

http://www.washington.edu/pine/tech-notes/low-level.html

Signed-off-by: Kumar Gala <383ef5577c6e1178b93f59ec8d0936f76d2a98c4@kernel.crashing.org>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git