Make sure that ol.source.wms.ServerType is documented

src/ol/source/wmssource.js

@@ -3,7 +3,11 @@ goog.provide('ol.source.wms.ServerType');
 
 
 /**
+ * Available server types: `'carmentaserver'`, `'geoserver'`, `'mapserver'`,
+ *     `'qgis'`. These are servers that have vendor parameters beyond the WMS
+ *     specification that OpenLayers can make use of.
  * @enum {string}
+ * @todo api
  */
 ol.source.wms.ServerType = {
   CARMENTA_SERVER: 'carmentaserver',

src/ol/source/wmssource.jsdoc

@@ -0,0 +1,3 @@
+/**
+ * @namespace ol.source.wms
+ */