+
+ (** lookup a given parameter
+ @param meth if given restrict the lookup area (e.g. if meth = POST than
+ only parameters received via POST are searched), if not given both GET and
+ POST parameter are searched in an unspecified order (actually the
+ implementation prefers POST parameters but this is not granted, you've
+ been warned)
+ @param name name of the parameter to lookup
+ @return value associated to parameter name
+ @raise Param_not_found if parameter name was not found *)