gender and size of leaders and nemeses

Combo fix based on several reports and additional research.
In quest.txt and/or data.base, the Grand Master, Arch Priest, Ixoth, Master
Kaen, Nalzok, Scorpius, and the Master Assassin are all referred to as male
via reference: his or him.  Ideally, there would be a way to parameterize
this in the quest.txt, but I don't see a clear way to do that at this time.
For the time being at least, set the M2_MALE flag for these monsters.

The Dark One was referred to via "his" once in the quest.txt.  This case
I was able to modify the offending text rather than forcing a gender.

Orion and Norn are referred to as a giant in data.base but their size did
not correspond.  I left the symbol as S_HUMAN although perhaps it should
be S_GIANT.  Finally, Orion, the Norn, Cyclops and Lord Surtur, as
giant-types, should be able to tear webs.

src/trap.c

@@ -2169,6 +2169,10 @@ glovecheck:		    target = which_armor(mtmp, W_ARMG);
 			    case PM_BALROG:
 			    case PM_KRAKEN:
 			    case PM_MASTODON:
+			    case PM_ORION:
+			    case PM_NORN:
+			    case PM_CYCLOPS:
+			    case PM_LORD_SURTUR:
 				tear_web = TRUE;
 				break;
 			}