lnd: add support for channel state snapshots in peer
lnd: add support for channel state snapshots in peer

aakselrod/lnd,AndrewSamokhvalov/lnd,AndrewSamokhvalov/lnd,BitfuryLightning/lnd,aakselrod/lnd,bryanvu/lnd,ddustin/lnd,LightningNetwork/lnd,BitfuryLightning/lnd,bryanvu/lnd,LightningNetwork/lnd,ddustin/lnd