- Present three new functions is/mark/clear_subsystem_dirty('name_of_subsystem'). This makes easier to create such things without needing to introduce new globals.
- Convert all pages to the new infrustructure
- This improves a lot the control on this notification
This function can sleep till the resource is free and can help find not well behaving code.
* Remove most of the config_lock/config_unlock logics on the whole scripts/pages it is an abuse of this.
If any sybsytem wants to lock can do so with its own lock.
* Lock the config when doing a filter reload to avoid parallell recursion on this function, since it is not reentrant.
This compenstates for the removal of lock aquiring from the scripts/pages.
* config_lock/config_unlock are now compate shims that do nothing. They are preserved since packages 'abuse' them too.
