Only allow llBreakAllLinks() to work if script has received PERMISSION_CHANGE_LINKS

As per http://wiki.secondlife.com/wiki/LlBreakAllLinks
Same as existing llCreateLink() and llBreakLink()

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs

@@ -3922,6 +3922,14 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public void llBreakAllLinks()
         {
             m_host.AddScriptLPS(1);
+
+            if ((m_item.PermsMask & ScriptBaseClass.PERMISSION_CHANGE_LINKS) == 0
+                && !m_automaticLinkPermission)
+            {
+                Error("llBreakAllLinks", "PERMISSION_CHANGE_LINKS permission not set");
+                return;
+            }
+
             SceneObjectGroup parentPrim = m_host.ParentGroup;
             if (parentPrim.AttachmentPoint != 0)
                 return; // Fail silently if attached

OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiLinkingTests.cs

@@ -141,5 +141,47 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
             SceneObjectGroup grp2 = m_scene.GetSceneObjectGroup("grp1-Part1");
             Assert.That(grp2, Is.Not.Null);
         }
+
+        [Test]
+        public void TestllBreakAllLinks()
+        {
+            TestHelpers.InMethod();
+
+            UUID ownerId = TestHelpers.ParseTail(0x1);
+
+            SceneObjectGroup grp1 = SceneHelpers.CreateSceneObject(3, ownerId, "grp1-", 0x10);
+            grp1.AbsolutePosition = new Vector3(10, 10, 10);
+            m_scene.AddSceneObject(grp1);
+
+            // FIXME: This should really be a script item (with accompanying script)
+            TaskInventoryItem grp1Item
+                = TaskInventoryHelpers.AddNotecard(
+                    m_scene, grp1.RootPart, "ncItem", TestHelpers.ParseTail(0x800), TestHelpers.ParseTail(0x900), "Hello World!");
+            
+            grp1Item.PermsMask |= ScriptBaseClass.PERMISSION_CHANGE_LINKS;
+
+            LSL_Api apiGrp1 = new LSL_Api();
+            apiGrp1.Initialize(m_engine, grp1.RootPart, grp1Item, null);
+
+            apiGrp1.llBreakAllLinks();
+
+            {
+                SceneObjectGroup nowGrp = m_scene.GetSceneObjectGroup("grp1-Part1");
+                Assert.That(nowGrp, Is.Not.Null);
+                Assert.That(nowGrp.Parts.Length, Is.EqualTo(1));
+            }
+
+            {
+                SceneObjectGroup nowGrp = m_scene.GetSceneObjectGroup("grp1-Part2");
+                Assert.That(nowGrp, Is.Not.Null);
+                Assert.That(nowGrp.Parts.Length, Is.EqualTo(1));
+            }
+
+            {
+                SceneObjectGroup nowGrp = m_scene.GetSceneObjectGroup("grp1-Part3");
+                Assert.That(nowGrp, Is.Not.Null);
+                Assert.That(nowGrp.Parts.Length, Is.EqualTo(1));
+            }
+        }
     }
 }