(map, unit_map, draw_map, player_coms[]):

(map, unit_map, draw_map, player_coms[]):
Modify nmap command to allow mapping around a nuke.
Add new command nbmap for bmapping around a nuke.
Add a new mapping flag 'n' for adding nukes to a map.
Correct syntax description for pmap, pbmap, lmap and lbmap
in player_coms[].