#3 SubMLListener produces NullPointerExcept

[Guénolé de Cadoudal]

We found that the submarine.util.esKernel class, used
internally by submarine.conectors.SubMLListener,
produces NullPointerException and could terminate
when more clients than sockets availables try to
connect.

This bug will be corrected probably by making calling
clients waitting for an available thread.