- WWSympa: Since CGI of some HTTP servers might split script-path and
extra-path of script-URI inproperly, we'd be better to reconstruct them: SCRIPT_NAME and PATH_INFO. Note that we shouldn't use non-standard CGI environment varialbes such as REQUEST_URI. - Additional environment variable SYMPA_DOMAIN stands for available mail domain (a.k.a. "robot"). - If no robot providing web service was found according to client's request, error response will be returned.