Redirect further SE links opened from within instance

[opusforlife2]

What's Happening?

Once you've opened an AO page, any further SE links end up taking you to the original SE website.

Like Libreddit/Redlib, AO should overwrite SE links within the opened page to that same AO instance.

How to reproduce:

1. Open an AO page with an SE link in the question/answers.
2. Click on that link.

Affected Platforms:

• all

Version: Don't know how to check. This should be made visible somewhere on every instance page. e.g. Libreddit/Redlib shows version at the bottom of the page.

Browser:

• Chromium-based (ex: Brave or Chrome)
• Webkit-based (ex: Safari)
• Gecko-based (ex: Firefox)

[httpjamesm]

Versions can be found at the instance homepage.

This seems trivial to do - should only be some regex magic.