Implement IGNORE_ROOT_AGGRO_RULES (special attack 42)

This allows you to have a mob be rooted but still try to attack the
target with the most amount of hate instead of attacking the closest

zone/common.h

@@ -134,8 +134,8 @@ enum {
 	DISABLE_MELEE = 39,
 	NPC_CHASE_DISTANCE = 40,
 	ALLOW_TO_TANK = 41,
-	MAX_SPECIAL_ATTACK = 42
-	
+	IGNORE_ROOT_AGGRO_RULES = 42,
+	MAX_SPECIAL_ATTACK = 43
 };
 
 typedef enum {	//fear states

zone/mob_ai.cpp

@@ -1088,7 +1088,7 @@ void Mob::AI_Process() {
 	{
 		// we are prevented from getting here if we are blind and don't have a target in range
 		// from above, so no extra blind checks needed
-		if (IsRooted() || IsBlind())
+		if ((IsRooted() && !GetSpecialAbility(IGNORE_ROOT_AGGRO_RULES)) || IsBlind())
 			SetTarget(hate_list.GetClosest(this));
 		else
 		{