updates to allow a wfs layer to query multiple wfs servers with the same parameters. untested, but all tests pass.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@941 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/HTTPRequest.js

@@ -93,7 +93,7 @@ OpenLayers.Layer.HTTPRequest.prototype =
     },
     
 
-    /** combine the layer's url with its params and these newParams. 
+    /** combine url with layer's params and these newParams. 
      *   
      *    does checking on the serverPath variable, allowing for cases when it 
      *     is supplied with trailing ? or &, as well as cases where not. 
@@ -102,13 +102,17 @@ OpenLayers.Layer.HTTPRequest.prototype =
      *        "server?key1=value1&key2=value2&key3=value3"
      * 
      * @param {Object} newParams
+     * @param {String} altUrl Use this as the url instead of the layer's url
      * 
      * @type String
      */
-    getFullRequestString:function(newParams) {
+    getFullRequestString:function(newParams, altUrl) {
         
-        //requestString always starts with url
-        var requestString = this.url;        
+        // use layer's url unless altUrl passed in
+        var url = (altUrl == null) ? this.url : altUrl;
+        
+        // requestString always starts with url
+        var requestString = url;        
 
         // create a new params hash with all the layer params and the 
         // new params together. then convert to string