[workqueue] Update workqueue users callbacks to additional arguments

[workqueue] Update workqueue users callbacks to additional arguments

2005-11-14 Paul Jakma <paul.jakma@sun.com>

	* (general) pass struct work-queue to callback functions.
	* workqueue.h: (struct work_queue) move the state flag
	  variables to end.
	  Add an opaque pointer to spec, for user-data global to the
	  queue.
	  Pass reference to work_queue to all callbacks.
	* workqueue.c: (work_queue_item_remove) pass ref to workqueue
	  to user callbacks.
	  (work_queue_run) ditto.