(player_coms, best): `bestdistpath' and `bestpath' violate the rule

(player_coms, best): `bestdistpath' and `bestpath' violate the rule
that commands must be unique within the first four letters.  best()
implements both.  It calls BestDistPath() for the former, and
BestLandPath() for the latter.  However, BestDistPath() is just a
wrapper around BestLandPath(); it does exactly the same.  Drop
`bestdistpath'.