send-email: pass Debug to Net::SMTP::SSL::new

We forgot to pass the Debug option through to Net::SMTP::SSL->new --
which is the same as Net::SMTP->new.  This meant that with security
set to SSL, we would never enable debug output.

Pass through the flag.

Signed-off-by: Thomas Rast <tr@thomasrast.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-send-email.perl

@@ -1217,6 +1217,7 @@ sub send_message {
 			$smtp ||= Net::SMTP::SSL->new($smtp_server,
 						      Hello => $smtp_domain,
 						      Port => $smtp_server_port,
+						      Debug => $debug_net_smtp,
 						      ssl_verify_params());
 		}
 		else {