[issue1303] Make vnconfig -l handle gracefully inaccessible special files

[Stathis Kamperis (via DragonFly issue tracker)]

Stathis Kamperis <ekamperi at gmail.com> added the comment:

Actually the exact error you get is:
[...]
[beket at sadness ~] rm lala.img
[beket at sadness ~] sudo vnconfig -l
vnconfig: ioctl: (null): Invalid argument

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status: unread -> chatting

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