On a web site with multi siteaccess.
If we want to use the same script at the same time on several siteaccess only one script will be execute, other will be lock by mutex.

In the class ezruncronjob.php
line 40
$scriptMutex = new eZMutex( $scriptFile );
should be replace by
$scriptMutex = new eZMutex( $scriptFile.siteacces );

it should be made optional via a cli option.