lnwire: modify newAlias to truncate alias strings if too long
lnwire: modify newAlias to truncate alias strings if too long

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