These URL schemes from RFC 1738 for logon via a terminal emulator have the form
telnet://user:password@host:port
but the :password component is
ignored.
To handle rlogin, telnet and tn3270 URLs, a
rlogin, telnet or tn3270
(the program names and arguments are hardcoded) session is run in
a terminal-emulator buffer. Well-known ports are
used if the URL does not specify a port.