I have made a patch to SoftEther VPN and created a Pull Request https://github.com/SoftEtherVPN/SoftEtherVPN/pull/208 in early December. With reference to SoftEther VPN Patch Acceptance Policy https://www.softether.org/5-download/src/9.patch this would be all I need.
However, it had not been touched for over a month, did I miss anything?
Thanks.