Bug#761511: misleading message about mount points in /etc/fstab

[Pierre Ynard]

> Seems so. This string is still present. I will take a look why it is
> there, and under what circumstances this suggestion is printed.

This message can be wrongly printed because of at least #818442
(read-only /dev). In fact it gets printed only if `rm -fr /dev/shm`
fails, and there aren't too many possible causes for that apart from
genuine mount mishaps and #818442, so it might just be a variation of
it, involving some NFS code path apparently.

-- 
Pierre Ynard