Use ed to verify %full messages.
Use ed to verify %full messages.

Modify seal/tear so that the messages are authenticated. After a %full
message, there is a shared secret, so no more authentication should be
necessary.

ngzax/urbit,urbit/urbit,ohAitch/arvo,eglaysher/arvo,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,jfranklin9000/urbit,ngzax/urbit,jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,solri/arvo,ngzax/urbit,belisarius222/arvo,ngzax/urbit,urbit/urbit,joemfb/arvo,ngzax/urbit,Fang-/arvo,ohAitch/arvo,cgyarvin/arvo,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,joemfb/arvo,jfranklin9000/urbit,cgyarvin/arvo,belisarius222/arvo,urbit/urbit