feat(wireguard): add debug logs for IPv6 detection

- To debug issue #998
- Enable with `LOG_LEVEL=debug`

internal/wireguard/log_mock_test.go

@@ -45,6 +45,23 @@ func (mr *MockLoggerMockRecorder) Debug(arg0 interface{}) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Debug", reflect.TypeOf((*MockLogger)(nil).Debug), arg0)
 }
 
+// Debugf mocks base method.
+func (m *MockLogger) Debugf(arg0 string, arg1 ...interface{}) {
+	m.ctrl.T.Helper()
+	varargs := []interface{}{arg0}
+	for _, a := range arg1 {
+		varargs = append(varargs, a)
+	}
+	m.ctrl.Call(m, "Debugf", varargs...)
+}
+
+// Debugf indicates an expected call of Debugf.
+func (mr *MockLoggerMockRecorder) Debugf(arg0 interface{}, arg1 ...interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	varargs := append([]interface{}{arg0}, arg1...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Debugf", reflect.TypeOf((*MockLogger)(nil).Debugf), varargs...)
+}
+
 // Error mocks base method.
 func (m *MockLogger) Error(arg0 string) {
 	m.ctrl.T.Helper()
@@ -57,6 +74,23 @@ func (mr *MockLoggerMockRecorder) Error(arg0 interface{}) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Error", reflect.TypeOf((*MockLogger)(nil).Error), arg0)
 }
 
+// Errorf mocks base method.
+func (m *MockLogger) Errorf(arg0 string, arg1 ...interface{}) {
+	m.ctrl.T.Helper()
+	varargs := []interface{}{arg0}
+	for _, a := range arg1 {
+		varargs = append(varargs, a)
+	}
+	m.ctrl.Call(m, "Errorf", varargs...)
+}
+
+// Errorf indicates an expected call of Errorf.
+func (mr *MockLoggerMockRecorder) Errorf(arg0 interface{}, arg1 ...interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	varargs := append([]interface{}{arg0}, arg1...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Errorf", reflect.TypeOf((*MockLogger)(nil).Errorf), varargs...)
+}
+
 // Info mocks base method.
 func (m *MockLogger) Info(arg0 string) {
 	m.ctrl.T.Helper()