Simple to use but not simple to use with authentication. In fact it does not work with user authentication and password. I hope someone will be able to implement at least a simple solution maybe basic authentication for srelay. Perhaps with the help of mini_httpd htpasswd.(mini-httpd-htpasswd is an utility to generate HTTP access authentication files)... htpasswd is build during the compilation of mini_httpd, but not put in mini_httpd package. htpasswd is basic authentication. (see squid-mod-basic-auth-ncsa). I use srelay in my OpenWRT router.