Redirect dead links to current pages

[riccardobl]

In an effort to fix dead links i wrote this cloudflare worker and did some remapping on the hub to get all the dead links redirected to existing pages.

However there is one type of dead link that i cannot fix from my side: https://wiki.jmonkeyengine.org/sdk/troubleshooting.html
These urls without the version in them should be redirected to either the last version or to https://wiki.jmonkeyengine.org/legacy that is where the worker is hosted (eg. https://wiki.jmonkeyengine.org/legacy/sdk/troubleshooting.html , this will automatically redirect ), which one is easier.

Note: it can be a client-side javascript redirect on the 404 page (for example), like the one used in https://javadoc.jmonkeyengine.org/latest