[CRIU] Fake mount points in dump

[Pavel Emelyanov]

>> It is. Check the /proc/pid/mountinfo files themselves, maybe the mp just
>> got propagated from host to container or vice versa.
> 
> I think the problem is much simpler.
> Autofs uses "parse" callback for early check, whether it can be dumped 
> (checking pipe status).
> The intention was to detect unsupported mounts early. But looks like 
> "parse" doesn't suit this role, because it's called for for host mounts.
> What was the reason behind this callback?

Parsing fs-specific options.

-- Pavel