remove socket from poller when worker exit
remove socket from poller when worker exit

jbfavre/exaproxy,PrFalken/exaproxy,PrFalken/exaproxy,david-farrar/exaproxy,PrFalken/exaproxy,david-farrar/exaproxy,david-farrar/exaproxy,jbfavre/exaproxy