added the Google Search Appliance (GSA) api interface to the main menu.

See:
https://developers.google.com/search-appliance/documentation/68/xml_reference#request_overview

htroot/env/templates/header.template

@@ -5,13 +5,14 @@
 
 <ul id="menu">
   <li class="menugroup" id="menugroupGlobalIndex">
-    <h3>Search</h3>
+    <h3>Search Interfaces</h3>
     <ul class="menu">
       <li><a href="/index.html" accesskey="s" class="MenuItemLink">Web Search</a></li>
       <li><a href="/yacyinteractive.html" class="MenuItemLink">File Search</a></li>
       <li><a href="/HostBrowser.html?hosts=" class="MenuItemLink">Host Browser</a></li>
       <li><a href="/yacysearch_location.html" class="MenuItemLink">Location Search</a></li>
       <li><a href="/solr/select?q=*:*&start=0&rows=3" class="MenuItemLink">Embedded Solr API</a></li>
+      <li><a href="/gsa/search?q=www&size=3" class="MenuItemLink">Embedded GSA API</a></li>
       <!--<li><a href="/yacy/ui/" accesskey="s" class="MenuItemLink">Rich Client Search</a></li>-->
       <li><a href="/compare_yacy.html?display=1" class="MenuItemLink">Compare Search</a></li>
       <li><a href="/ConfigPortal.html" class="MenuItemLink">Search Integration</a></li>

source/net/yacy/cora/federate/solr/responsewriter/GSAResponseWriter.java

@@ -74,7 +74,7 @@ public class GSAResponseWriter implements QueryResponseWriter {
 
 
     private static final char[] XML_START = (
-                    "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<GSP VER=\"3.2\">\n").toCharArray();
+                    "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<GSP VER=\"3.2\">\n<!-- This is a Google Search Appliance API, see https://developers.google.com/search-appliance/documentation/68/xml_reference -->\n").toCharArray();
     private static final char[] XML_STOP = "</GSP>\n".toCharArray();
 
     // define a list of simple YaCySchema -> RSS Token matchings