* SSH: Add local TCP forwarding option
Add allow_tcp_forwarding option, to allow local port forwarding by the SSH add-on. Code lifted from the more advanced [SSH & Web Terminal](https://github.com/hassio-addons/addon-ssh) add-on.
* Bump version to 8.6.0
* SSH: Rename tcp_forwarding option
* Update ssh.sh
* Update DOCS.md
Co-authored-by: Pascal Vizeli <pascal.vizeli@syshack.ch>