fixed various problems that popped up while testing the library code; we now no longer try to convert filter input data (with regard to safestrings), since that turned out to be impossible
fixed various problems that popped up while testing the library code; we now no longer try to convert filter input data (with regard to safestrings), since that turned out to be impossible

rossowl/coffin,akx/coffin,rossowl/coffin