Other half of SetVariableEvent:

Other half of SetVariableEvent:

	* library/srctextwin.ith (handle_set_hook): Rename to set_variable.
	* library/srctextwin.itb (set_variable): Handle SetVariableEvent.
	(constructor): Remove gdb_set_hook.
	(destructor): Ditto.
	* library/srcbar.itcl: Inherit from GDBEventHandler.
	(set_hook): Rename to set_variable and handle SetVariableEvent.
	(constructor): Remove gdb_set_hook.
	(destructor): Ditto.
	* library/regwin.ith (handle_set_hook): Renamed to set_variable.
	* library/regwin.itb (set_variable): Handle SetVariableEvent.
	(constructor): Remove gdb_set_hook.
	(destructor): Ditto.
	* library/kod.ith (set_os): Renamed to "set_variable".
	* library/kod.itb (set_variable): Handle SetVariableEvent.
	(constructor): Remove gdb_set_hook.
	(destructor): Ditto.
	* library/tclIndex: Regenerated.