The FS.List and FS.RemoveList are up to 42x faster by precompiling the
globbing pattern.
The CleanupFS from restreamer/fs is up to 32x faster in the benchmarks
and cleanup is now only every 5 seconds instead of every second.
The listing options are implemented by the query parameters size_min,
size_max, lastmod_start, and lastmod_end, or by the new ListOptions
type. size_min and size_max expect a number of bytes, lastmod_start
and lastmod_end expect a unix timestamp. All values are inclusive.
