S3FS: include etag in getinfo() output
S3FS: include etag in getinfo() output

PyFilesystem/pyfilesystem,rivenz/pyfilesystem,pmitros/pyfs,piranna/pyfilesystem,zopyx/pyfilesystem,flying-circus/pyfilesystem,pombreda/pyfilesystem,Konubinix/pyfilesystem,pmitros/pyfs