hs: Return the 0xF6 extended socks error for a v2
In #40373 (closed), we made it that a v2 address is properly parsed and then a warning is logged indicating that it is not supported anymore.
Problem is that we failed to send back a 0xF6 extended socks error code so Tor Browser UX is better. At the moment, we just close the stream and thus TB gets "Unable to connect".
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information