[openvpn_server] Add DCO for Plus versions

[jhamlin96]

• Improves CE vs Plus version checking
• Adds preliminary support for DCO in openvpn_server

Tested against CE 2.8.0 and Plus 25.11.

[opoplawski]

Thanks for the submission!

I'm not sure why the tests don't seem to be allowed to run, but that's something that will need to get sorted out.

Also, please add a changelog fragment.

[jhamlin96]

Thanks @opoplawski, implemented your feedback. The sanity and unit tests run for me locally, not sure what you are referring to.

[opoplawski]

Apparently since the PR was older than 30 days I could no longer approve the workflow. With the updates I was able to. One issue to resolve.

[jhamlin96]

Added changelog fragment and fixed one issue for tests. Thanks!

[opoplawski]

Could you give me push permissions to JEPEL1/core ? I'd like to rebase the commits a bit. Thanks.

[jhamlin96]

Do you want me to rebase against master?

[opoplawski]

I was looking to make it look like this: master...openvpn-add-dco

I might just close this and make a PR from that. I'm used to be being able to push changes to other people's branches of this project. I'm not sure what is different here / now.

[jhamlin96]

This PR is from a branch in my fork of this repository, not a branch within your repository. The end result in the commit history should still be the same?

[opoplawski]

No, because I've re-ordered and squashed some commits.