- Implement remote addr for conn

- Eliminate cached offeranswer arguments
- Fix exponent reset in conn reconnect loop
- Fix on disconnected callback for permanent server
- Add peer relay status for status details command

relay/client/addr.go

@@ -0,0 +1,13 @@
+package client
+
+type RelayAddr struct {
+	addr string
+}
+
+func (a RelayAddr) Network() string {
+	return "relay"
+}
+
+func (a RelayAddr) String() string {
+	return a.addr
+}