fcgi_add_stdin
int fcgi_add_stdin(struct client *, const char *, size_t);
fcgi_add_stdin(clt, NULL, 0);
if (fcgi_add_stdin(clt, buf, size) == -1)
fcgi_add_stdin(clt, NULL, 0);
if (fcgi_add_stdin(clt, buf, size) == -1)
fcgi_add_stdin(clt, NULL, 0);