If a community uses different vpn providers, they typically
assume the same MTU for the wan device underneath the VPN. As
different VPN providers however have different overhead, the MTU
of the VPN device differs for each provider. Therefore this
commit makes the MTU of the VPN device provider specific.
This has two advantages:
1. The same site.conf can used to bake firmwares for different
VPN providers (only by selecting a diferent vpn feature in the
site.mk).
2. We are coming closer to the option of integrating multiple VPN
providers into one firmware.
This fully abstracts VPN methods, making gluon-mesh-vpn-fastd and
gluon-mesh-vpn-tunneldigger completely self-contained.
Provide a LUA interface for generic interacting with VPN methods in
gluon-mesh-vpn-core and web packages.
This also adds the ability to install tunneldigger and fastd to the same
image, selecting the VPN method based on the selected domain.
Signed-off-by: David Bauer <mail@david-bauer.net>
