MDL-21641 cookieless sessions - Need to try to set a cookie before fa…

…lling back to cookieless mode. Moved test to see if cookies are working till after Moodle has attempted to set a cookie. If there is no cookie then we use session id in url.

lib/setup.php

@@ -566,10 +566,7 @@ function addslashes_deep($value) {
     if (!empty($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]) && $_COOKIE['MoodleSessionTest'.$CFG->sessioncookie] == "deleted") {
         unset($_COOKIE['MoodleSessionTest'.$CFG->sessioncookie]);
     }
-    if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
-        require_once("$CFG->dirroot/lib/cookieless.php");
-        sid_start_ob();
-    }
+
 
     if (empty($nomoodlecookie)) {
         session_name('MoodleSession'.$CFG->sessioncookie);
@@ -618,7 +615,10 @@ function addslashes_deep($value) {
         $FULLME = qualified_me();
         $ME = strip_querystring($FULLME);
     }
-
+    if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
+        require_once("$CFG->dirroot/lib/cookieless.php");
+        sid_start_ob();
+    }
 /// In VERY rare cases old PHP server bugs (it has been found on PHP 4.1.2 running
 /// as a CGI under IIS on Windows) may require that you uncomment the following:
 //  session_register("USER");