move http-override stuff to its own method, clarify the logic a little. standardize comparisons and negations.
move http-override stuff to its own method, clarify the logic a little. standardize comparisons and negations.

mbrzuchalski/Aura.Accept,auraphp/Aura.Web,harikt/Aura.Accept,jakejohns/Aura.Accept,auraphp/Aura.Accept,dstockto/Aura.Web