if (val > (60 * 60 * 24 * 365)) val = (60 * 60 * 24 * 365);
static void httpd__conf_req_reset_cache_control(struct Httpd_req_data *req,                                                unsigned int val){  Vstr_base *s1 = req->xtra_content;  size_t pos = req->cache_control_pos;  size_t len = req->cache_control_len;    ASSERT(pos && len);  ASSERT(vstr_sc_poslast(pos, len) == s1->len);    if (vstr_add_fmt(s1, pos - 1, "max-age=%u", val))  {    vstr_sc_reduce(s1, 1, s1->len, len);    req->cache_control_len = vstr_sc_posdiff(pos, s1->len);  }}