Implement bounded XML LLSD codec

crates/libremetaverse-structured-data/src/dispatch.rs

@@ -160,15 +160,15 @@ mod tests {
             deserialize_bytes(b"<? llsd/binary ?>i\0\0\0\0".to_vec()),
             Ok(OSD::Integer(0))
         );
+        assert_eq!(
+            deserialize_bytes(b"<llsd><undef /></llsd>".to_vec()),
+            Ok(OSD::Undefined)
+        );
         let cases: &[(&[u8], &str)] = &[
             (
                 b"<? llsd/protobuf ?>",
                 "M:LibreMetaverse.StructuredData.OSDParser.DeserializeLLSDProtobuf(System.Byte[])",
             ),
-            (
-                b"<llsd><undef /></llsd>",
-                "M:LibreMetaverse.StructuredData.OSDParser.DeserializeLLSDXml(System.Byte[])",
-            ),
             (
                 b"{}",
                 "M:LibreMetaverse.StructuredData.OSDParser.DeserializeJson(System.String)",