No server changes are needed to use SSL or Tor -just connect to https://www.mises.org over Tor.
You are correct that "https" can be used to see the homepage. I also found that it can be used to login or with certain articles.
The problem:
1. Navigate to https://www.mises.org
2. Click on a link.
3. That link is guaranteed to begin with "http"
This feature makes privacy and censorship avoidance diffcult for the viewer.
The solution:
Provide an "https" if the page that the user is currently on is secure.
The steps would go something like:
3. Detect that the user is current using "https"
4. Convert the link such that it also begins with "https"
Depending on how the site is implemented this might be an easy change or a more challenging one.
Relative path links should take care of http/https differences.