Change Roundcube SMTP port to 25 (#29)

lib/os/class.ISPConfigDebianOS.inc.php

@@ -1078,6 +1078,7 @@ mailman-unsubscribe:  "|/var/lib/mailman/mail/mailman unsubscribe mailman"';
 			$replacements = array(
 				'/^\s*\$config\s*\[["\']default_host["\']\]\s*=.*$/m' => '$config[\'default_host\'] = \'localhost\';',
 				'/^\s*\$config\s*\[["\']smtp_server["\']\]\s*=.*$/m' => '$config[\'smtp_server\'] = \'%h\';',
+				'/^\s*\$config\s*\[["\']smtp_port["\']\]\s*=.*$/m' => '$config[\'smtp_port\'] = 25;',
 				'/^\s*\$config\s*\[["\']smtp_user["\']\]\s*=.*$/m' => '$config[\'smtp_user\'] = \'%u\';',
 				'/^\s*\$config\s*\[["\']smtp_pass["\']\]\s*=.*$/m' => '$config[\'smtp_pass\'] = \'%p\';'
 			);