* Allow setting link priorities
* Fix a bug
* Allow setting priority on listeners and multicast interfaces
* Update `yggdrasilctl`
* Update to Arceliar/ironwood#5
* Link refactoring
* More refactoring
* More tweaking
* Cleaner shutdowns, UNIX socket support, more tweaks
* Actorise links, remove mutex
* SOCKS support
* Do not exit on multicast errors (mobile)
* Consistency with cmd/yggdrasil/main.go
Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>