fixing old voidlinux.eu links

[sww1235]

These pages still show up in web search results and can cause confusion depending on what entity owns the old domain now.

I took care to not change the posts explaining the move to the new domain.

I did not update links to defunct locations like the wiki or forum, but I am willing to do that if desired.

If the project has a desire to leave these pages the way they are, no worries and feel free to close the pull request.