irc
The irc scheme is defined in the Internet Draft at https://www.w3.org/Addressing/draft-mirashi-url-irc-01.txt (which was never approved as an RFC). Such URLs have the form
bash
irc://host:port/target,needpassand are retrieved by opening an IRC session using the function specified by url-irc-function.
User Option: url-irc-function
The value of this option is a function, which is called to open an IRC connection for irc URLs. This function must take five arguments, host, port, channel, user and password. The channel argument specifies the channel to join immediately, and may be nil.
The default is url-irc-rcirc, which uses the Rcirc package. Other options are url-irc-erc (which uses ERC) and url-irc-zenirc (which uses ZenIRC).