add visualwikipedia.com and .net redirects (RT #4677)

these were ours but didn't point to our DNS, they did exist
as links to wikipedia zone though.

simply adding ServerAliases and they will match the "catch-all" and
redirect to en.wikipedia.org

Change-Id: Ife70e2cbe5cb02ae0ae96615eb9b5961b1d89c29