Move port-publishing check to linux platform-check

Windows does not have host-mode networking, so on Windows, this
check was a no-op

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

daemon/container.go

@@ -351,8 +351,5 @@ func (daemon *Daemon) verifyContainerSettings(platform string, hostConfig *conta
 	if warnings, err = verifyPlatformContainerSettings(daemon, hostConfig, config, update); err != nil {
 		return warnings, err
 	}
-	if hostConfig.NetworkMode.IsHost() && len(hostConfig.PortBindings) > 0 {
-		warnings = append(warnings, "Published ports are discarded when using host network mode")
-	}
 	return warnings, err
 }

daemon/daemon_unix.go

@@ -607,6 +607,10 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *containertypes.
 		warnings = append(warnings, "IPv4 forwarding is disabled. Networking will not work.")
 		logrus.Warn("IPv4 forwarding is disabled. Networking will not work")
 	}
+	if hostConfig.NetworkMode.IsHost() && len(hostConfig.PortBindings) > 0 {
+		warnings = append(warnings, "Published ports are discarded when using host network mode")
+	}
+
 	// check for various conflicting options with user namespaces
 	if daemon.configStore.RemappedRoot != "" && hostConfig.UsernsMode.IsPrivate() {
 		if hostConfig.Privileged {