mark jabberwocks as M1_NOHANDS

Jabberwocks are flagged as animals hence won't use items, or else
this would have been obvious long ago.  They weren't flagged as no-hands,
so a hero in their form could wear gloves and/or wield a weapon (or a
cockatrice corpse, whose ineffectiveness when used with a claw attack
which followed a bite attack led to the discovery of this oversight).
I'm not sure what a jabberwock ultimately looks like, but am pretty sure
that it shouldn't have usable hands, particularly ones which are only
usable by a poly'd hero and not by jabberwock monsters.

doc/fixes34.4

@@ -409,6 +409,7 @@ unlit candelabrum would become unlightable if its candles had exactly 1 turn
 	of fuel left and it was applied anywhere other than the invocation spot
 temporary loss of Dex from wounded legs will become permanent if it occurs
 	while mounted and hero dismounts before steed's legs have healed
+jaberwocks don't have hands
 
 
 Platform- and/or Interface-Specific Fixes