Gateway creation for OpenVPN Client interfaces

[pasha-19]

The system automatically generates gateways for IPv4 and IPv6 when an OpenVPN Client interface is enabled.  I create my OpenVPN Clients with Disable IPv6 checked.  Should the IPv6 gateway be automatically created in this case?  I disable the _VPNV6 gateways and my OpenVPN Client appears to work correctly.  This is largely an FYI item for those designing the proper OPNsense actions to router configuration events.