Fs.smbfs

Fixed
- `SMBFS.getinfo` crashing when requesting access info from a SMB1 server.

Added
- Support for FS URL parameters in `SMBOpener`.

Fixed
- `direct_tcp` parameter being ignored in `SMBFS.__init__`.
- `SMBFS` always using guest account instead of provided username/password.
- `COPYING` file not being added to wheel distributions.
- Wrong info namespace being checked in `SMBFS.scandir`.
- Uncatched socket error on connection failure in `SMBFS.__init__`.

Fixed
- `SMBConnection` not being closed by `SMBFS.close`.

Changed
- Pinned minimum required `six` version to `v1.10` in `setup.cfg`.

Changed
- Bumped `pysmb` version to `v1.1.22`.

Removed
- Temporary `pysmb` bugfix for [miketeo/pysmb90](https://github.com/miketeo/pysmb/issues/90.

Fixed
- `SMBFile.truncate` changing the position in the file.
- Unicode paths not working properly ([miketeo/pysmb90](https://github.com/miketeo/pysmb/issues/90)).

Removed
- Invalid `SMBFile.__length_hint__` special method.
- Debug `print` call left in `SMBFS.openbin`.