[bugfix] Set the lexical handler so that Comments etc are not lost

extensions/exquery/restxq/src/main/java/org/exist/extensions/exquery/restxq/impl/RestXqServiceImpl.java

@@ -270,6 +270,7 @@ private DocumentImpl parseAsXml(final InputStream is) {
             builder.startDocument();
             final DocumentBuilderReceiver receiver = new DocumentBuilderReceiver(builder, true);
             reader.setContentHandler(receiver);
+            reader.setProperty("http://xml.org/sax/properties/lexical-handler", receiver);
             reader.parse(src);
             builder.endDocument();
             final Document doc = receiver.getDocument();