Master

Fix to compile gitlab-runner on netbsd.

The only question is about file vendor/github.com/docker/docker/client/client_unix.go i've commited it but when i was building runner i noticed that this file was not taken from working copy, instead it was taken from ~/go/pkg/mod/github.com/docker/engine@v1.4.2-0.20190822180741-9552f2b2fdde/client/client_unix.go which is an old version of docker engine. The current version already has that fix.

I'm no a Go programmer so i dunno if it's ok