set flags at all (i.e. through early returns) or only UNTOUCHED
flags. This breaks the positional flagging scheme, which should
have one digit for every funtion applied.

Revert "refactored register.py as @schaefed suggested, renamed former CallCtrl to CallState and made it more KISSier"

This reverts commit df70798c.

refactored register.py as @schaefed suggested, renamed former CallCtrl to CallState and made it more KISSier

the word 'Flagger' now is History, we have 'Flags' now (except for plotting, which is old and deaf and probably die soon anyway)