Add a torrc flag to disable ADD_ONION creation.

Please add a flag, that can be set in /etc/tor/torrc to forbid the tor client from creating onion services, using the control port command ADD_ONION.

Letting the default be permissive is reasonable.

This can be useful for the tor-browser and tails that don't need ADD_ONION under normal circumstances.

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