all: Revert the underscore sillyness

lib/beacon/broadcast.go

@@ -126,9 +126,9 @@ func (w *broadcastWriter) Serve() {
 		for _, ip := range dsts {
 			dst := &net.UDPAddr{IP: ip, Port: w.port}
 
-			_ = conn.SetWriteDeadline(time.Now().Add(time.Second))
+			conn.SetWriteDeadline(time.Now().Add(time.Second))
 			_, err := conn.WriteTo(bs, dst)
-			_ = conn.SetWriteDeadline(time.Time{})
+			conn.SetWriteDeadline(time.Time{})
 
 			if err, ok := err.(net.Error); ok && err.Timeout() {
 				// Write timeouts should not happen. We treat it as a fatal

lib/beacon/multicast.go

@@ -117,9 +117,9 @@ func (w *multicastWriter) Serve() {
 		success := 0
 		for _, intf := range intfs {
 			wcm.IfIndex = intf.Index
-			_ = pconn.SetWriteDeadline(time.Now().Add(time.Second))
+			pconn.SetWriteDeadline(time.Now().Add(time.Second))
 			_, err = pconn.WriteTo(bs, wcm, gaddr)
-			_ = pconn.SetWriteDeadline(time.Time{})
+			pconn.SetWriteDeadline(time.Time{})
 
 			if err != nil {
 				l.Debugln(err, "on write to", gaddr, intf.Name)