Allow to disable no-cache so that SSL can work fine with IE and Flash

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10660 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/http/HttpBindServlet.java

@@ -323,10 +323,12 @@ public class HttpBindServlet extends HttpServlet {
         response.setCharacterEncoding("utf-8");
 
         if ("GET".equals(method)) {
-        	// Prevent caching of responses
-        	response.addHeader("Cache-Control", "no-store");
-        	response.addHeader("Cache-Control", "no-cache");
-        	response.addHeader("Pragma", "no-cache");
+            if (JiveGlobals.getBooleanProperty("xmpp.httpbind.client.no-cache.enabled", true)) {
+                // Prevent caching of responses
+                response.addHeader("Cache-Control", "no-store");
+                response.addHeader("Cache-Control", "no-cache");
+                response.addHeader("Pragma", "no-cache");
+            }
             content = "_BOSH_(\"" + StringEscapeUtils.escapeJavaScript(content) + "\")";
         }