v8.5.1

Changelog

539d668 bump 8.5.1
768f3e1 bump 8.5.1
a968f49 better help
911bb22 better environmental variable
5879682 update deps
f3697f6 reduce packets sent for peer discovery
5374be1 use dns to determine relay
1d874b5 bump 8.5.0
586fc08 bump 8.5.0