fix broken permalink behaviour

  set ignoredLayers to 4 and added missing outcommented layers for documentation

index.php

@@ -97,14 +97,16 @@
             var layer_tidalscale;                  // 16
             var layer_permalink;                   // 17
             var layer_waterdepth_trackpoints_100m;      // 18
+            // var layer_elevation_profile_contours;  // 19
+            // var layer_elevation_profile_hillshade;  //20
             var layer_waterdepth_trackpoints_10m;      // 21
             var layer_waterdepth_contours;        // 22
 
             // To not change the permalink layer order, every removed
             // layer keeps its number. The ArgParser compares the
             // count of layers with the layers argument length. So we
             // have to let him know, how many layers are removed.
-            var ignoredLayers = 2;
+            var ignoredLayers = 4;
 
             // Select controls
             var selectControl;