Print contents of our own channel updates for broadcast in non-gossip logs

[TheBlueMatt]

currently when we send a broadcast update for one of our channels (a pretty important action) we only log Handling BroadcastChannelUpdate event in peer_handler for scid X, which is kinda useless, we really want to know more about the update itself (which is only logged at the GOSSIP level). We should include the contents in that log.

[Sharmalm]

can i try this issue

[TheBlueMatt]

Sure! Shouldn't be that hard, just add the message itself in a {:?} in the string.

[Sharmalm]

I think channelUpdate message consists various type of information like signature , chain_hash , short_channel_id , timestamp , message_flags , ..... etc . so we have to add all the information instead of only short_channel_id.
For this above action, we can replace msg.contents.short_channel_id to msg.contents.

[TheBlueMatt]

Fixed in #2519.