hilite_status type 'up' or 'down' vs strings

hilite_status type 'up' or 'down' vs strings

The temporary highlight types 'goes-up' and 'goes-down' aren't useful
for the three string status fields (title, dungeon-level, alignment)
since the string values might go up when the underlying value goes up
or might go down instead (and similarly for down, down, up).  The code
involved can compare strings but the values are effectively arbitrary
so the comparison is only really useful for same vs changed.  This
treats types 'up' and 'down' for strings as 'changed' when coming from
config file and no longer offers them as choices when using 'O'.

Config file parsing perhaps ought to treat them as errors instead.