Replace all session_start() calls with sqsession_is_active(). The latter

is a conditional session_start which will only start a session if none
has been before. This will make us compatible with the upcoming PHP 4.3.3
release. Thanks Phil Driscoll for the tip.

ChangeLog

@@ -76,7 +76,9 @@ Version 1.5.0 -- CVS
   - sqimap_msgs_list_copy() no longer deletes messages copied.
   - Workaround for Mozilla bug #200412 in order to show multipart/related html mail.
   - Fix for disapearing '0' from decoded strings (bug #784193)
-  
+  - Replace all session_start() calls with sqsession_is_active() to be compatible
+    with upcoming PHP 4.3.3.
+
 
 **************************************
 *** SquirrelMail Stable Series 1.4 ***

include/validate.php

@@ -50,7 +50,7 @@ if(isset($session_name) && $session_name) {
     ini_set('session.name' , 'SQMSESSID');
 }
 
-session_start();
+sqsession_is_active();
 
 require_once(SM_PATH . 'functions/i18n.php');
 require_once(SM_PATH . 'functions/auth.php');

src/redirect.php

@@ -37,7 +37,7 @@ header('Pragma: no-cache');
 $location = get_location();
 
 session_set_cookie_params (0, $base_uri);
-session_start();
+sqsession_is_active();
 
 sqsession_unregister ('user_is_logged_in');
 sqsession_register ($base_uri, 'base_uri');

src/webmail.php

@@ -31,7 +31,7 @@ if (!function_exists('sqm_baseuri')){
 }
 $base_uri = sqm_baseuri();
 
-session_start();
+sqsession_is_active();
 
 sqgetGlobalVar('username', $username, SQ_SESSION);
 sqgetGlobalVar('delimiter', $delimiter, SQ_SESSION);