lnd: add sync logic in lnd main
lnd: add sync logic in lnd main

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