lnwire: introduce new NetAddress struct for p2p node addr+key info
lnwire: introduce new NetAddress struct for p2p node addr+key info

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