[core] Remove config data from session as it brings chicken-egg problem.

Configuration data stores PmaAbsoluteUri, which should be accessible
before initiating session. Otherwise there is no way to make
PmaAbsoluteUri work. PmaAbsoluteUri is needed at least for reverse
proxy setups, for example http webserver running behind https proxy.

libraries/session.inc.php

@@ -31,8 +31,8 @@ if (!@function_exists('session_name')) {
 //ini_set('session.auto_start', 0);
 
 // session cookie settings
-session_set_cookie_params(0, PMA_Config::getCookiePath() . '; HttpOnly',
-    '', PMA_Config::isHttps());
+//session_set_cookie_params(0, PMA_Config::getCookiePath() . '; HttpOnly',
+//    '', PMA_Config::isHttps());
 
 // cookies are safer (use @ini_set() in case this function is disabled)
 @ini_set('session.use_cookies', true);
@@ -79,7 +79,7 @@ if (! isset($_COOKIE[$session_name])) {
     }
     unset($orig_error_count);
 } else {
-    @session_start();
+    session_start();
 }
 
 /**
@@ -102,4 +102,4 @@ function PMA_secureSession()
     // prevent session fixation and XSS
     session_regenerate_id(true);
 }
-?>
+?>