[Freeswitch-users] Trust "Proxy-Authorization:" header

I would like to know if there is an option in FreeSWITCH so that if an INVITE comes in and already has the "Proxy-Authorization:" header (set on proxy), we should accept this as authenticated (and set user etc.) and not challenge it, to avoid double authentication as we already auth on the proxy. If such feature doesn't exist I would like to know if it makes sense to open a Bounty for it. Thanks