MAPWIDTH(x) was (x+2)/2 - 1 too small. Affected were path and route,
which use MAPWIDTH(3) to size their map buffer: they clobber map rows'
terminating zero when the map spans the whole world in x. rout() has
a cheesy work-around for that since Chainsaw 2. path() doesn't, and
duly breaks.
The function that gave its name to this file is long gone, the file's
description is bogus, and it contains just one definition. Move that
to ../subs/border.c, and delete the file.
other. Ensure headers in include/ can be included in any order
(except for econfig-spec.h, which is special). New header types.h to
help avoid inclusion cycles. Sort include directives. Remove some
superflous includes.
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[].
