Bug#1021122: ssh: Please increase unix_listener socket path limit (path ... too long for Unix domain socket)

[Colin Watson]
> Sorry, this is a Linux API limitation and not something that OpenSSH
> can change.  See unix(7).

Aha.  Sad to hear.  Hoped it was simpler to extend than rewriting
Linux. :)

> Given what you've posted, you could probably work around it by
> shortening the path prefix in ControlPath.  Not pretty, but it would
> let you use onion addresses here.

Ah, of course.  I changed to use "ControlPath ~/.ssh/sock/%C" instead,
and it seem to work better.