callbackshandler: handle @ring.dht uri for all contacts
callbackshandler: handle @ring.dht uri for all contacts

And be prepared to sha256

Change-Id: Ib2338034ba9e362f9b129d09728929a3fd85c703

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc