New for 1.2, with a vt100 or ANSI emulator, this will allow you to set up
a split screen. The keyboard input will be displayed in the bottom window,
while mud text is displayed in the upper window. This requires a fairly
decent emulator, but works on most I have tested. The screen will be split
at the line indicated by line #, and should be around 3 lines above the
bottom of the screen. When the enter key is pressed, the text will
be sent to the mud, and also be echoed to the upper window.
If a line # isn't specified, the screen is split at line 21.