API_EXPORT_NONSTD(int) ap_send_header_field(request_rec *r, const char *fieldname, const char *fieldval)
API_EXPORT_NONSTD(int) ap_rvputs(request_rec *r,...)
API_EXPORT_NONSTD(int) ap_send_header_field(request_rec *r,                                            const char *fieldname,                                            const char *fieldval){    if (strcasecmp(fieldname, "ETag") == 0) {        if (ap_table_get(r->notes, "no-etag") != NULL) {            return 1;        }    }    return (0 < ap_rvputs(r, fieldname, ": ", fieldval, CRLF, NULL));}