Usage: `/PING [nick]'
Sends a /CTCP Ping to the user with the submitted nick and return the time it took to receive it back. If no nick is given the PING will be sent to the server.
Related: CTCP
Examples:
`/PING Bill'
Will send a PING to BILL and return:
`«Pong»' PING Response received from Bill: 2.4s