Requires us to update to latest lnproto which is now using the most up
to date python-bitcoinlib, as well as updating our python lock files
(which pin the grpcio deps, because of locking problems h/t @cdecker)
Over time, it has cost us more developer cycles than it has gained.
It has hidden intermittant bugs, and allowed cruft to accumulate:
when we eventually tried to figure out what was going wrong, the
actual change which caused it was now stale and forgotten.
This was a particular bane during the connectd rewrite, and I
worked through some issues which had occurred before, but were not
more likely.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
