correct switched ERR_FATAL and ERR_DROP setting in Q_strncpyz(Debug), so that broken downloaded cgames just drop the client in NDEBUG, and fatal otherwise (not the other way around)
coneptually clarify and and set states accordingly for act(), delay and the active state in relation to each other
keep track of "upstream" call-ins with the entity for walking the call hierachy
this will replace the kept activator soon, and allow us to walk the call hierachy completly with caller and used calldefinition
eventually we might use this for a simple loop detection
also notify and clean callin onCustom