* library/interface.tcl (gdb_busy_hook): Deprecate.

	* library/interface.tcl (gdb_busy_hook): Deprecate.
	(gdbtk_busy): Create and dispatch a BusyEvent instead
	of running hooks.
	* library/ehandler.ith (busy): New event handler.
	* library/gdbevent.ith (BusyEvent): New event class.
	* library/console.ith: Inherit from GDBEventHandler.
	(busy): Match event handler definition.
	* library/console.itb (busy): Ditto.
	(constructor): Remove gdb_busy_event.
	(destructor): Ditto.
	* library/kod.ith (busy): Match event handler definition.
	* library/kod.itb (busy): Ditto.
	(constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/memwin.ith (busy): Match event handler definition.
	* library/memwin.itb (busy): Ditto.
	(constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/pluginwin.itcl (running): Rename to "busy" and
	match event handler definition.
	(consturctor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/process.ith (busy): Match event handler definition.
	* library/process.itb (busy): Ditto.
	(constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/regwin.ith (busy): Match event handler definition.
	* library/regwin.itb (busy): Ditto.
	(constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/srcbar.itcl (constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	(busy): New method.
	* library/srcwin.ith (busy): Match event handler definition.
	* library/srcwin.itb (busy): Ditto.
	Only do the "busy" stuff if do_updates is set.
	(toggle_updates): Remove gdb_busy_hook.
	(constructor): Ditto.
	(destructor): Ditto.
	* library/stackwin.ith (busy): Match event handler definition.
	* library/stackwin.itb (busy): Ditto.
	(constructor): Remove gdb_busy_hook.
	(destructor): Ditto.
	* library/variables.tcl (constructor): Ditto.
	(destructor): Ditto.
	(disable_ui): Rename to "busy" and match event handler
	definition.
	* library/plugins/rhabout/rhabout.itcl (running): Rename
	to "busy" and match new event handler definition.
	* library/tclIndex: Regenerated.