Added User validation in shell and web tform files.

interface/web/sites/form/shell_user.tform.php

@@ -97,7 +97,7 @@ $form["tabs"]['shell'] = array (
 							'type' => 'CUSTOM',
 							'class' => 'validate_systemuser',
 							'function' => 'check_sysuser',
-							'check_names' => true,
+							'check_names' => false,
 							'errmsg' => 'invalid_username_txt'
 						),
 			),

interface/web/sites/form/web_domain.tform.php

@@ -603,7 +603,7 @@ if($_SESSION["s"]["user"]["typ"] == 'admin') {
 						1 => array(
 							'type' => 'CUSTOM',
 							'class' => 'validate_systemuser',
-							'function' => 'check_sysuser',
+							'function' => 'check_sysgroup',
 							'check_names' => true,
 							'errmsg' => 'invalid_system_user_or_group_txt'
 						),