Adjust miss rate for 1.65 compliance

* The base miss rate for players is supposed to be 18%, but spec was taken into account during Atlas because 18% wasn't very fun. However, making spec matter means players could get about a 7% reduction in miss rate when fully spec and at high RR.
* 1.117C, added to every weapon a miss rate reduction of 5%, which was previously only applied to special weapons such as artifacts. But this is a very late patch.
* Also changed the base miss rate of NPCs from 25% to 18%. 25% was absurdly high and unsourced (18 years old code).

GameServer/ECS-Components/AttackComponent.cs

@@ -2580,7 +2580,8 @@ public int GetMissChance(WeaponAction action, AttackData ad, AttackData lastAD,
             if ((owner is GamePlayer player && player.IsSitting) || action.RangedAttackType == eRangedAttackType.Volley)
                return 0;
 
-            int missChance = ad.Attacker is GamePlayer or GameSummonedPet ? 18 : 25;
+            // In 1.117C, every weapon was given the intrinsic 5% flat bonus special weapons (such as artifacts) had, lowering the base miss rate to 13%.
+            int missChance = 18;
             missChance -= ad.Attacker.GetModified(eProperty.ToHitBonus);
 
             if (owner is not GamePlayer || ad.Attacker is not GamePlayer)
@@ -2633,9 +2634,6 @@ public int GetMissChance(WeaponAction action, AttackData ad, AttackData lastAD,
             if (lastAD != null && lastAD.AttackResult == eAttackResult.HitStyle && lastAD.Style != null)
                 missChance += lastAD.Style.BonusToDefense;
 
-            if (owner is GamePlayer && ad.Attacker is GamePlayer && weapon != null)
-                missChance -= (int) ((ad.Attacker.WeaponSpecLevel(weapon) - 1) * 0.1);
-
             if (action.ActiveWeaponSlot == eActiveWeaponSlot.Distance)
             {
                 DbInventoryItem ammo = ad.Attacker.rangeAttackComponent.Ammo;