Merge branch 'jm/send-email-tls-auth-on-batch'

"git send-email" when using in a batched mode that limits the
number of messages sent in a single SMTP session lost the contents
of the variable used to choose between tls/ssl, unable to send the
second and later batches, which has been fixed.

* jm/send-email-tls-auth-on-batch:
  send-email: fix tls AUTH when sending batch

Author: gitster

git-send-email.perl

@@ -1479,7 +1479,7 @@ sub send_message {
 							 SSL => 1);
 			}
 		}
-		else {
+		elsif (!$smtp) {
 			$smtp_server_port ||= 25;
 			$smtp ||= Net::SMTP->new($smtp_server,
 						 Hello => $smtp_domain,
@@ -1501,7 +1501,6 @@ sub send_message {
 					$smtp->starttls(ssl_verify_params())
 						or die sprintf(__("STARTTLS failed! %s"), IO::Socket::SSL::errstr());
 				}
-				$smtp_encryption = '';
 				# Send EHLO again to receive fresh
 				# supported commands
 				$smtp->hello($smtp_domain);