fork of bazil.org/fuse for gcsfuse

 This package is an implementation detail of github.com/jacobsa/fuse, which is
 used by gcsfuse. You likely should be using bazil.org/fuse (contained in
 Debian package golang-bazil-fuse-dev) directly.
 .
 Changes from upstream are:
 .
  * The function SetOption allows for setting arbitrary mount options.