logs now show in /var/log/curlftpfs, when enabled
previously unaccessed mounts still time out on first access without net, only it takes 120s instead of the more typical 20s
since each mount expires independently, it can still take 15 minutes after 'ls /mnt/servo/media' for that directory to become usable (but at least it *does*)
this is an unfortunate effect of the drop_privileges part of fuse3,
that the mount is active as soon as the fs implementation is launched,
instead of when it enters `fuse_main`.
