- fix HTTPS checking (#1486273)

program/include/iniset.php

@@ -51,8 +51,8 @@ if (set_include_path($include_path) === false) {
 }
 
 ini_set('error_reporting', E_ALL&~E_NOTICE);
-if  (isset($_SERVER['HTTPS'])) {
-   ini_set('session.cookie_secure', ($_SERVER['HTTPS'] && ($_SERVER['HTTPS'] != 'off'))?1:0);
+if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') {
+   ini_set('session.cookie_secure', 1);
 } else {
    ini_set('session.cookie_secure', 0);
 }

program/include/main.inc

@@ -1410,7 +1410,7 @@ function rcube_https_check($port=null, $use_https=true)
 {
   global $RCMAIL;
   
-  if (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off')
+  if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off')
     return true;
   if ($port && $_SERVER['SERVER_PORT'] == $port)
     return true;

program/include/rcmail.php

@@ -1063,7 +1063,7 @@ class rcmail
   {
     $cookie = session_get_cookie_params();
     setcookie($name, $value, $exp, $cookie['path'], $cookie['domain'],
-      ($_SERVER['HTTPS'] && ($_SERVER['HTTPS'] != 'off')));
+      rcube_https_check());
   }
 }