intrinsics revamp (trunk only)

Simplify many of the intrinsics macros from
  #define xxx_resistance (Hxxx || Exxx || resists_xxx(&youmonst))
down to
  #define xxx_resistance (Hxxx || Exxx)
by setting or clearing an extra bit in Hxxx during polymorph so that the
resists_xxx() check becomes implicit.

     Unfornately there were lots of places in the code that treat Hxxx
as a timeout number--primarily for Stunned, Confused, and Hallucination;
Stunned happens to be one of the revised macros--rather than as a bit
mask, so this patch needed a lot more changes than originally antipated.

src/end.c

@@ -686,9 +686,9 @@ int how;
 	    newuhs(FALSE);
 	}
 	/* cure impending doom of sickness hero won't have time to fix */
-	if ((Sick & TIMEOUT) == 1) {
+	if ((Sick & TIMEOUT) == 1L) {
 	    u.usick_type = 0;
-	    Sick = 0;
+	    set_itimeout(&Sick, 0L);
 	}
 	if (how == CHOKING) init_uhunger();
 	nomovemsg = "You survived that attempt on your life.";