A strict version of header_parse_param_list that bails out if there are duplicate parameters.
Note that this function will treat RFC5987-encoded parameters as duplicated if an ASCII version is also present. For header fields that might contain RFC5987-encoded parameters, use header_parse_param_list instead.
header |
a header value |
a GenericSet of list elements, which can be freed with
header_free_param_list or |