event_server: add a function for getting the pid of the job_event_handler.
event_server: add a function for getting the pid of the job_event_handler.

This handle can be used to directly query the job_event_handler (without going
through the event_server).

simudream/disco,mwilliams3/disco,discoproject/disco,beni55/disco,mwilliams3/disco,beni55/disco,discoproject/disco,ktkt2009/disco,beni55/disco,mwilliams3/disco,oldmantaiter/disco,seabirdzh/disco,oldmantaiter/disco,ktkt2009/disco,pombredanne/disco,seabirdzh/disco,discoproject/disco,mozilla/disco,discoproject/disco,pombredanne/disco,pombredanne/disco,discoproject/disco,ktkt2009/disco,ErikDubbelboer/disco,simudream/disco,ErikDubbelboer/disco,simudream/disco,seabirdzh/disco,ErikDubbelboer/disco,ktkt2009/disco,mwilliams3/disco,pombredanne/disco,pombredanne/disco,simudream/disco,oldmantaiter/disco,oldmantaiter/disco,ktkt2009/disco,pooya/disco,pooya/disco,ErikDubbelboer/disco,pooya/disco,seabirdzh/disco,oldmantaiter/disco,pooya/disco,mozilla/disco,seabirdzh/disco,beni55/disco,simudream/disco,mozilla/disco,ErikDubbelboer/disco,mozilla/disco,beni55/disco,mwilliams3/disco