Move all dunnet globals up to the top

Move all dunnet globals up to the top

* lisp/play/dunnet.el: Adjust comments to reflect moved forms.
(dun-visited, dun-current-room, dun-exitf):
(dun-badcd, dun-computer, dun-floppy, dun-key-level, dun-hole):
(dun-correct-answer, dun-lastdir, dun-numsaves, dun-jar, dun-dead):
(room, dun-numcmds, dun-wizard, dun-endgame-question, dun-logged-in):
(dungeon-mode, dun-unix-verbs, dun-dos-verbs, dun-batch-mode):
(dun-cdpath, dun-cdroom, dun-uncompressed, dun-ethernet):
(dun-restricted, dun-ftptype, dun-endgame, dun-rooms):
(dun-light-rooms, dun-verblist, dun-inbus, dun-nomail, dun-ignore):
(dun-mode, dun-sauna-level, north, south, east, west, northeast):
(southeast, northwest, southwest, up, down, in, out, dungeon-map):
(dun-objnames, obj-special, dun-room-objects, dun-room-silents):
(dun-inventory, dun-objects, dun-object-lbs, dun-object-pts):
(dun-objfiles, dun-perm-objects, dun-physobj-desc, dun-permobj-desc):
(dun-diggables, dun-room-shorts, dun-endgame-questions): Move to the
top of the file, before any uses.