[sr-dev] where is s proxy_challenge function?

since people seemed to agree that s auth module is superior to k one, i decided to try porting k auth_radius module to use s auth api and was able to compile and build it against s auth api. when testing the result, i get errors about "unknown command, missing loadmodule" when script has proxy_challenge() call. i then went and checked s auth module and found this in README: 1.4.2. proxy_challenge(realm, qop) The function challenges a user agent. ... however, auth_mod.c does not include such function: /* * Exported functions */ static cmd_export_t cmds[] = { {"consume_credentials", consume_credentials, 0, 0, REQUEST_ROUTE}, {"bind_auth_s", (cmd_function)bind_auth_s, 0, 0, 0 }, {0, 0, 0, 0, 0} }; i don't find it even with grep on s modules. where is it? -- juha