Add lightway-core protocol

[AkramiPro]

Hi .
first of all, thank you for great work at SoftEtherVPN
can you please check lightway-core and add it to SE ?
it is developed by ExpressVPN

it's under GPLv2 license

https://lightway.com/docs/lightway-core/1.0.0/faq
https://github.com/expressvpn/lightway-core

[chipitsine]

we experience difficulties supporting protocol mix, more protocols = more bugs.
however, it is not a 100% blocker, if you feel an appetite for developing and support features by submitting pull requests, it may happen