+ whois: add WHOIS information for a client

+ return WHOIS info in GET /clients response

home/dns_test.go

@@ -7,7 +7,7 @@ import (
 func TestResolveRDNS(t *testing.T) {
 	config.DNS.BindHost = "1.1.1.1"
 	initDNSServer(".")
-	if r := resolveRDNS("1.1.1.1"); r != "one.one.one.one" {
+	if r := config.dnsctx.rdns.resolve("1.1.1.1"); r != "one.one.one.one" {
 		t.Errorf("resolveRDNS(): %s", r)
 	}
 }