A previous commit (33f72e6) added notification via netlink for tunnels
when created/modified/deleted. If the notification returned an error,
this error was returned from the tunnel function. If there were no
listeners, the error code ESRCH was returned, even though having no
listeners is not an err
From: Mark Tomlinson
Date: Mon, 15 Feb 2016 16:24:44 +1300
> A previous commit (33f72e6) added notification via netlink for tunnels
> when created/modified/deleted. If the notification returned an error,
> this error was returned from the tunnel function. If there were no
> listeners, the error c
