Force autocommit mode in mysql database driver (#1488902)

CHANGELOG

@@ -1,6 +1,10 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Force autocommit mode in mysql database driver (#1488902)
+
+RELEASE 0.9-beta
+----------------
 - Fix searching by date in address book (#1488888)
 - Improve charset detection by prioritizing charset according to user language (#1485669)
 - Fix handling of escaped separator in vCard file (#1488896)

program/lib/Roundcube/rcube_db_mysql.php

@@ -126,6 +126,9 @@ class rcube_db_mysql extends rcube_db
         // Always return matching (not affected only) rows count
         $result[PDO::MYSQL_ATTR_FOUND_ROWS] = true;
 
+        // Enable AUTOCOMMIT mode (#1488902)
+        $dsn_options[PDO::ATTR_AUTOCOMMIT] = true;
+
         return $result;
     }