Added 1.8.8.6 to the list of supported versions for upgrade

main/install/index.php

@@ -110,7 +110,7 @@ error_reporting(E_ALL);
 // Upgrading from any subversion of 1.6 is just like upgrading from 1.6.5
 $update_from_version_6 = array('1.6', '1.6.1', '1.6.2', '1.6.3', '1.6.4', '1.6.5');
 // Upgrading from any subversion of 1.8 avoids the additional step of upgrading from 1.6
-$update_from_version_8 = array('1.8', '1.8.2', '1.8.3', '1.8.4', '1.8.5', '1.8.6', '1.8.6.1', '1.8.6.2','1.8.7','1.8.7.1','1.8.8','1.8.8.2', '1.8.8.4');
+$update_from_version_8 = array('1.8', '1.8.2', '1.8.3', '1.8.4', '1.8.5', '1.8.6', '1.8.6.1', '1.8.6.2','1.8.7','1.8.7.1','1.8.8','1.8.8.2', '1.8.8.4', '1.8.8.6');
 
 $my_old_version = '';
 $tmp_version = get_config_param('dokeos_version');