wgengine: adjust debug logging for WireGuard-only peers

Updates #cleanup

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

wgengine/pendopen.go

@@ -146,6 +146,7 @@ func (e *userspaceEngine) onOpenTimeout(flow flowtrack.Tuple) {
 		return
 	}
 	n := pip.Node
+	if !n.IsWireGuardOnly {
 		if n.DiscoKey.IsZero() {
 			e.logf("open-conn-track: timeout opening %v; peer node %v running pre-0.100", flow, n.Key.ShortString())
 			return
@@ -154,6 +155,7 @@ func (e *userspaceEngine) onOpenTimeout(flow flowtrack.Tuple) {
 			e.logf("open-conn-track: timeout opening %v; peer node %v not connected to any DERP relay", flow, n.Key.ShortString())
 			return
 		}
+	}
 
 	ps, found := e.getPeerStatusLite(n.Key)
 	if !found {
@@ -187,6 +189,9 @@ func (e *userspaceEngine) onOpenTimeout(flow flowtrack.Tuple) {
 	_ = ps.LastHandshake
 
 	online := "?"
+	if n.IsWireGuardOnly {
+		online = "wg"
+	} else {
 		if n.Online != nil {
 			if *n.Online {
 				online = "yes"
@@ -197,6 +202,7 @@ func (e *userspaceEngine) onOpenTimeout(flow flowtrack.Tuple) {
 		if n.LastSeen != nil && online != "yes" {
 			online += fmt.Sprintf(", lastseen=%v", durFmt(*n.LastSeen))
 		}
+	}
 	e.logf("open-conn-track: timeout opening %v to node %v; online=%v, lastRecv=%v",
 		flow, n.Key.ShortString(),
 		online,