Add second parameter to expel() method to define whether or not the attendee should be allowed to rejoin

Hi,

It would be great if we allowed the attendee to rejoin the meeting by adding a second parameter for the expel() method.

Currently, the attendee is not allowed to rejoin by default, however a second parmeter such as expel(123456, true) could be added to allow them to rejoin the meeting.

Thanks,
Alex