Apply restricted_msg to ChanMsg parts of tor-proto
This is part two of my work on #525 (closed): It cleans up and extends the tor-cell macros a bit more, and applies them to ChanMsg and ChanCell.
This is part two of my work on #525 (closed): It cleans up and extends the tor-cell macros a bit more, and applies them to ChanMsg and ChanCell.