Incomplete "WireGuard Alternatives" Section

[ShiroTohu]

Incomplete WireGuard Alternatives Section

I have create a WireGuard Alternatives Section to list other alternative methods you could use that are similar or achieve the same result as this guide proposes. I have done a little bit of that section but want to work on other things in the guide. There are to be two paragraphs associated with the alternatives.

1. Brief summary of what it is
2. How it compares to WireGuard / this guide

I understand that last point is a little vague. There are certain alternatives that you can't really compare to WireGuard. Therefore comparing it to the contents of the guide is a good alternative. Feel free to add what you feel is necessary.