channeldb: write the CommitSig in CommitDiff in LN wire format#4099

Roasbeef wants to merge 3 commits into

lightningnetwork:masterlightningnetwork/lnd:masterfrom

Roasbeef:db-wire-msg-length-prefixRoasbeef/lnd:db-wire-msg-length-prefixCopy head branch name to clipboard