Merge pull request #841 from valentinewallace/207-replacement

Expose counterparty forwarding info in ChannelDetails

diff --cc lightning/src/ln/channel.rs
Simple merge

diff --cc lightning/src/ln/channelmanager.rs
Simple merge

diff --cc lightning/src/ln/msgs.rs
Simple merge

diff --cc lightning/src/ln/peer_handler.rs
Simple merge