Reapply "Fix #2005 XEVE-16-008 XSS 방지 및 XSS를 통해 특정 명령을 실행할 수 있는 보안취약점 해결"

This reverts commit e9f9bec9ca.

modules/member/member.admin.view.php

@@ -118,6 +118,7 @@ class memberAdminView extends member
 
 		$security = new Security();
 		$security->encodeHTML('member_list..user_name', 'member_list..nick_name', 'member_list..group_list..');
+		$security->encodeHTML('search_target', 'search_keyword');
 
 		$this->setTemplateFile('member_list');
 	}