lnd: fix bug causing help (./lnd -h) to be printed twice
lnd: fix bug causing help (./lnd -h) to be printed twice

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