Added missing SELECT permission to table monitor_data on master server in master / slave setups.

install/lib/installer_base.lib.php

@@ -324,7 +324,7 @@ class installer_base {
                 $this->error('Unable to create database user in master database: '.$conf['mysql']['master_ispconfig_user'].' Error: '.$this->dbmaster->errorMessage);
             }
             
-            $query = "GRANT INSERT , DELETE ON ".$conf['mysql']['master_database'].".`monitor_data` "
+            $query = "GRANT SELECT, INSERT , DELETE ON ".$conf['mysql']['master_database'].".`monitor_data` "
                     ."TO '".$conf['mysql']['master_ispconfig_user']."'@'".$src_host."' "
                     ."IDENTIFIED BY '".$conf['mysql']['master_ispconfig_password']."';";
             if(!$this->dbmaster->query($query)) {