SSLH Update to v2.1.2

[efaden]

Important notices Before you add a new report, we ask you kindly to acknowledge the following:

• [X] I have read the contributing guide lines at https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md
• [X] I have searched the existing issues, open and closed, and I'm convinced that mine is new.
• [X] When the request is meant for an existing plugin, I've added its name to the title.

Is your feature request related to a problem? Please describe. Feature, or rather a plugin version update. The latest version of sslh has a vulnerability fix as well as allowing UDP now.

Describe the solution you'd like Update sslh to version 2.1.2

Describe alternatives you've considered Using sslh on another machine and using a port forward.

Additional context Add any other context or screenshots about the feature request here.

[fichtner]

We're just following the FreeBSD ports. If anyone wants to prod there be my guest.