middleware/httproxy: smaller timeouts

Make the timeouts smaller after we fail to connect.

middleware/httpproxy/google.go

@@ -73,7 +73,7 @@ func (g *google) Exchange(req *dns.Msg) (*dns.Msg, error) {
 
 		timeout := addr.FailTimeout
 		if timeout == 0 {
-			timeout = 10 * time.Second
+			timeout = 5 * time.Second
 		}
 		atomic.AddInt32(&addr.Fails, 1)
 		go func(host *proxy.UpstreamHost, timeout time.Duration) {
@@ -185,7 +185,7 @@ func (g *google) lookup(r *dns.Msg) ([]string, error) {
 
 		timeout := host.FailTimeout
 		if timeout == 0 {
-			timeout = 10 * time.Second
+			timeout = 7 * time.Second
 		}
 		atomic.AddInt32(&host.Fails, 1)
 		go func(host *proxy.UpstreamHost, timeout time.Duration) {

middleware/httpproxy/upstream.go

@@ -22,7 +22,7 @@ func newSimpleUpstream(hosts []string) (*simpleUpstream, error) {
 	upstream := &simpleUpstream{
 		Hosts:       nil,
 		Policy:      &proxy.Random{},
-		FailTimeout: 10 * time.Second,
+		FailTimeout: 3 * time.Second,
 		MaxFails:    3,
 	}