Prompt changes

Date:Fri Feb 7 15:00:26 2003
After next reboot, the game prompt is going to change as follows.

- If you have selected "prompt light", your prompt will begin with one of
  the following symbols (in order of descending priority):

     *     Sunlight, direct or indirect
     !     Artificial light
     )     Moonlight, direct or indirect
     o     Darkness

- You can activate a new option, "prompt terrain", which will display a
  symbol for the terrain you are standing in. You can find the complete
  list of symbols in HELP TERRAIN.

The use of "prompt terrain" is probably going to reveal some rooms with a
wrong terrain type, especially in older zones. Please report these as typos.