make git-send-email.perl handle email addresses with no names when Email::Valid is present

When using git-send-email.perl on a changeset that has:
	Cc: <stable@kernel.org>
in the body of the description, and the Email::Valid perl module is
installed on the system, the email address will be deemed "invalid" for
some reason (Email::Valid isn't smart enough to handle this?) and
complain and not send the address the email.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-send-email.perl

@@ -410,6 +410,7 @@ sub extract_valid_address {
 	return $address if ($address =~ /^($local_part_regexp)$/);
 
 	if ($have_email_valid) {
+		$address =~ s/^<(.*)>$/$1/;
 		return scalar Email::Valid->address($address);
 	} else {
 		# less robust/correct than the monster regexp in Email::Valid,