Fix the Handler in cmd/links

cmd/links/links.go

@@ -20,7 +20,7 @@ var (
 	validSchemes = flag.String("schemes", "http,https", "comma-separated list of allowed protocols")
 )
 
-func extractLinks(p crawl.Publisher, u string, depth int, resp *http.Response, _ error) error {
+func extractLinks(p crawl.Publisher, u string, tag, depth int, resp *http.Response, _ error) error {
 	links, err := analysis.GetLinks(resp)
 	if err != nil {
 		// Not a fatal error, just a bad web page.