tor-prompt / tor-cli SETEVENTS support

One can type SETEVENTS circ into tor-prompt, but event replies are silently ignored. It would be useful (to have an option) to watch them.

It would be a usability feature. Always have too look up, copy and paste the following two commands.

socat - UNIX-CONNECT:/var/run/tor/control

echo "AUTHENTICATE $(xxd -c 32 -g 0 /var/run/tor/control.authcookie | awk '{print $2}')"