schedule: Use the new multi-label support
schedule: Use the new multi-label support

We've removed the pfsense specific 'schedule' keyword, and now use the new
multi-label support. That is, schedules are now just another label (prefixed
with 's:'). We also use the classic pfctl kill option (-k) rather than
our home-grown '-y'.

dennypage/pfsense,pfsense/pfsense,dennypage/pfsense,dennypage/pfsense,pfsense/pfsense,NewEraCracker/pfsense,pfsense/pfsense,pfsense/pfsense,dennypage/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense