manual: document that ControlSocket is disabled by default

https://www.torproject.org/docs/tor-manual.html.en#ControlSocket

" Like ControlPort, but listens on a Unix domain socket, rather than a TCP socket. 0 disables ControlSocket (Unix and Unix-like systems only.) "

Please add: "(Default: 0)" add the end (as you do with most other entries).

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information