make it clear with docs that maxFeatures can be specified on Protocol.WFS (non-functional change)

Author: Bart van den Eijnden

lib/OpenLayers/Protocol/WFS/v1.js

@@ -46,6 +46,11 @@ OpenLayers.Protocol.WFS.v1 = OpenLayers.Class(OpenLayers.Protocol, {
      *     "the_geom" for WFS <version> 1.0, and null for higher versions.
      */
     geometryName: "the_geom",
+
+    /**
+     * Property: maxFeatures
+     * {Integer} Optional maximum number of features to retrieve.
+     */
 
     /**
      * Property: schema