So, the function waiting for TUN to come up never succeeds:
```
func waitForTUNUp(ch <-chan wgtun.Event) bool {
t := time.After(time.Second * 5)
for {
select {
case ev := <-ch:
if ev == wgtun.EventUp {
return true
}
case <-t:
return false
}
}
}
```
I've tried the sleep for one second, and it works flawlessly on several
PCs.
Another point - sometimes, if the service stop abruptly (in case of some
errors) there is an old hidden device in the system, that we need to
uninstall, and then create new.
This PR updates the Wireguard dependency and updates to use new
vectorised reads/writes, which should reduce the number of syscalls and
improve performance.
This will only make a difference on Linux as this is the only platform
for which the Wireguard TUN library supports vectorised reads/writes.
For other platforms, single reads and writes will be performed as usual.
---------
Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
