Core/Units: Renamed and documented UNIT_FLAG_DISABLE_MOVE to prevent people from trying to use this flag to root a creature leaving them wondering why it doesn't do anything

src/server/scripts/Spells/spell_generic.cpp

@@ -1927,7 +1927,7 @@ class spell_gen_mounted_charge: public SpellScriptLoader
                         }
 
                         // If target isn't a training dummy there's a chance of failing the charge
-                        if (!target->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_DISABLE_MOVE) && roll_chance_f(12.5f))
+                        if (!target->IsCharmedOwnedByPlayerOrPlayer() && roll_chance_f(12.5f))
                             spellId = SPELL_CHARGE_MISS_EFFECT;
 
                         if (Unit* vehicle = GetCaster()->GetVehicleBase())