static int send_header(void *data, const char *key, const char *val)
{
     ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
                 key, ": ", val, CRLF, NULL);
     return 1;
 }
static int send_header(void *data, const char *key, const char *val)
{
     ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
                 key, ": ", val, CRLF, NULL);
     return 1;
 }