derivation of channels doesn't automatically learn the new nonce

[willscott]

currently the first message after a call to Connect will fail because the nonce is stale, the new nonce will need to be learned from the response, and the message will need to be resent. Instead, the client should buffer the most recent message to be passed through send so that read message can auto-resend in appropriate cases - like when an alternate server, transport, realm, or nonce is needed.