[Virtio-fs] [virtiofsd] MR merged: Increment the rlimit_nofile for all sandbox modes

[virtiofs-bot at sinrega.org]

Currently, we only increment the rlimit_nofile with the user-supplied
value within sandbox modes 'chroot' and 'namespace'. However, in the
'namespace' mode, we don't honor '--rlimit-nofile=0' and we increase
the value to the maximum, as in the default case.
    
This commit try to increase the rlimit_nofile for all modes,
honoring '--rlimit-nofile=0'. Additionally, it leaves the limit
unchanged if the limit is greater than 1M. Also, if everything fails
the hard limit is used.
    

Closes #37
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https://gitlab.com/virtio-fs/virtiofsd/-/merge_requests/104