src/http/modules/ngx_http_referer_module.c:414: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_add_regex_referer`.

src/http/modules/ngx_http_referer_module.c:391:13: Unknown value from: strcmp
389.         }
390. 
391.         if (ngx_strcmp(value[i].data, "none") == 0) {
                 ^
392.             rlcf->no_referer = 1;
393.             continue;

src/http/modules/ngx_http_referer_module.c:414:25: Call
412.                 if (sn[n].regex) {
413. 
414.                     if (ngx_http_add_regex_referer(cf, rlcf, &sn[n].name,
                             ^
415.                                                    sn[n].regex)
416.                         != NGX_OK)

src/http/modules/ngx_http_referer_module.c:500:1: <LHS trace>
498. 
499. 
500. static char *
     ^
501. ngx_http_add_regex_referer(ngx_conf_t *cf, ngx_http_referer_conf_t *rlcf,
502.     ngx_str_t *name, ngx_regex_t *regex)

src/http/modules/ngx_http_referer_module.c:500:1: Parameter `name->len`
  498. 
  499. 
  500. static char *
       ^
  501. ngx_http_add_regex_referer(ngx_conf_t *cf, ngx_http_referer_conf_t *rlcf,
  502.     ngx_str_t *name, ngx_regex_t *regex)

src/http/modules/ngx_http_referer_module.c:531:5: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_add_regex_referer` 
  529.     err.data = errstr;
  530. 
  531.     name->len--;
           ^
  532.     name->data++;
  533. 
