161_profile_masks: codestyle fixes
useflag lib: fixed 2 bugs (results must return)
task/script #171: full rework

completed items:
* rename it, so now it is active
* split code as its done in #161
* made changes for task system
* made changes that is required for flags (161 was for mask/unmask)
* #171 works wit non local flags
* #172 works wit local flags
profile_use_force_mask_flags: new check

Added new check script that prints useflags that are in profile
use.{force,mask} files but are absent in global/local/special flags