Add settings.ini setting and hwengine param to disable holiday silliness (hat changes, etc.) settings.ini: In section [misc], add "holidaySilliness=false" hwengine: Add --no-holiday-silliness to command-line

void fpcrtl_halt(int num) {
    __coverity_panic__();
}

int fpcrtl_abs(int num) {
    return num >= 0 ? num : -num;
}