Add omit_buc -option

The option defaults to on, which is the old-style behaviour.
Turning the option off will never omit the "uncursed" -status
from inventory lines. This is pretty much required if users
want to use menucolors based on the BUC state.

dat/opthelp

@@ -24,6 +24,7 @@ mail           enable the mail daemon                             [TRUE]
 null           allow nulls to be sent to your terminal            [TRUE]
                try turning this option off (forcing NetHack to use its own
                delay code) if moving objects seem to teleport across rooms
+omit_buc       omit "uncursed" from inventory, if possible        [TRUE]
 perm_invent    keep inventory in a permanent window               [FALSE]
 pickup_thrown  override pickup_types for thrown objects           [TRUE]
 pushweapon     when wielding a new weapon, put your previously