Creates a new ircII window by either opening a new 'screen' window or 'xterm' window depending on the environment. 'screen' is a popular program which allows multiple windows to be recalled under unix and displayed one at a time on even a vt100 terminal. The X environment is a graphical interface for high resolution monitors usually attached to UNIX machines.
Currently, all xterms must be the same size as each other.
See also: window/delete