We'll assert if we try: better to truncate, trace a warning, and let the
recipient complain about a truncated message,
This is particularly an issue when we're sending encapsulated messages;
this avoids extra checks in the caller.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The API formalizes how daemons should report their statuses back to
the main lightningd. It's a simple write API, which includes tracing
support (currently it always sends traces, later it could send iff
there's a failure, for example).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
