all: replace /kb/ links with /s/ equivalents

Signed-off-by: Maisem Ali <maisem@tailscale.com>

tsnet/tsnet.go

@@ -83,7 +83,7 @@ type Server struct {
 	Logf logger.Logf
 
 	// Ephemeral, if true, specifies that the instance should register
-	// as an Ephemeral node (https://tailscale.com/kb/1111/ephemeral-nodes/).
+	// as an Ephemeral node (https://tailscale.com/s/ephemeral-nodes).
 	Ephemeral bool
 
 	// AuthKey, if non-empty, is the auth key to create the node
@@ -822,7 +822,7 @@ func (s *Server) ListenTLS(network, addr string) (net.Listener, error) {
 		return nil, err
 	}
 	if len(st.CertDomains) == 0 {
-		return nil, errors.New("tsnet: you must enable HTTPS in the admin panel to proceed. See https://tailscale.com/kb/1153/enabling-https/")
+		return nil, errors.New("tsnet: you must enable HTTPS in the admin panel to proceed. See https://tailscale.com/s/https")
 	}
 
 	lc, err := s.LocalClient() // do local client first before listening.