Speed up local onion access if hidden service is hosted on same client.
Client--->Tor(*:9150,hosting XXXXXXXXX.onion)<--->Internet
Current version: Client->Tor [find XXXXXXXXX.onion] Tor->Internet [same] Internet->Tor [XXXXXXXXX.onion is you] Tor->Client [send XXXXXXXXX.onion data]
Future version: Client->Tor [find XXXXXXXXX.onion] Tor-Tor [It's me!] Tor->Client [send XXXXXXXXX.onion data]