Install: Add missing field in group_properties table.

Author: jexi

install/install_db.php

@@ -447,6 +447,7 @@
     `private_forum` TINYINT(4) NOT NULL DEFAULT 0,
     `documents` TINYINT(4) NOT NULL DEFAULT 1,
     `wiki` TINYINT(4) NOT NULL DEFAULT 0,
+    `public_users_list` TINYINT(4) NOT NULL DEFAULT '1',
     `booking` TINYINT(4) NOT NULL DEFAULT 0,
     `agenda` TINYINT(4) NOT NULL DEFAULT 0) $tbl_options");