Changelog-Added: JSON-RPC: `listpeerchannels` new output fields `their_max_total_htlc_out_msat` and `our_max_total_htlc_out_msat` as the value of `max_htlc_value_in_flight` (as of BOLT02) set by the local and remote nodes on channel creation.
Changelog-Deprecated: JSON-RPC: `listpeerchannels` value `max_total_htlc_in_msat`: use `our_max_total_htlc_out_msat` instead to follow spec naming convention.