set DEFAULT_MESSAGE to 8 days (#932)

Author: michield

public_html/lists/admin/init.php

@@ -597,8 +597,8 @@
     define('MAX_AVATAR_SIZE', 2000);
 }
 if (!defined('DEFAULT_MESSAGEAGE')) {
-    define('DEFAULT_MESSAGEAGE', 604800);
-} //# 7 days in seconds
+    define('DEFAULT_MESSAGEAGE', 691200);
+} //# 8 days in seconds
 if (!defined('ADD_EMAIL_THROTTLE')) {
     define('ADD_EMAIL_THROTTLE', 1);
 } //# seconds between addemail ajax requests