Reset default db_max_allowed_packet, fix max packet size detection

Aleksander Machniak

2015-02-25 2a31f6dbd7c63232918d175fb2879682217946ea

 program/lib/Roundcube/rcube_cache_shared.php

@@ -595,8 +595,10 @@
            $this->max_packet = 2097152; // default/max is 2 MB

            if ($this->type == 'db') {
                $value = $this->db->get_variable('max_allowed_packet', 1048500);
                $this->max_packet = min($value, $this->max_packet) - 2000;
                if ($value = $this->db->get_variable('max_allowed_packet', $this->max_packet)) {
                    $this->max_packet = $value;
                }
                $this->max_packet -= 2000;
            }
            else if ($this->type == 'memcache') {
                $stats = $this->db->getStats();