Revision 1028711

Allow FastCGI apps more time to exit at shutdown before being
forcefully killed.

The main changes in behavior are

* if app doesn't go away at first graceful shutdown, try again
  after t0 + 1 second
* wait until t0 + 8 seconds before forceful shutdown

Previously it tried graceful shutdown, waited one second, then
did forceful shutdown for any apps still alive.