Cleaning up the Download options

I've just reviewed all the download options on the website. A number are
out of date or have other issues, so I think we need to have a cleanup:

Primary downloads:

- postgresql.org packages are up to date.
- EDB installers are up to date.
- BigSQL installers are up to date.
- postgres.app is up to date.
- Fink is a release behind on 9.4 through 10, and doesn't carry 11 at all
as far as I can tell.
- MacPorts is up to date.
- The Homebrew link seems to go to a download site which after many clicks
gives me the Windows installer from EDB(!). I've fixed that now. The
packages appear to be a release behind on all supported branches.

Thoughts on whether we should make any changes to the Fink and Brew
distributions? We used to require that the primary downloads be maintained
on our schedule, so by rights they should be removed.

Secondary (third party) downloads:

- LiveCD - this hasn't been updated since 9.6 in December 2016. It should
be removed.

- 2UDA - This hasn't been updated since May 2018, and is currently carrying
11beta1, 10.4, 9.6.9 and 9.5.13. I think this should be removed.

- TurnKey - Deploying this requires signing up to their service. I
eventually tracked down the manifest file for their images and found they
ship 9.4.6. This should be removed.

- BitNami images are up to date.

Comments etc? I'm out from EOD until Tuesday, but will review any comments
somewhen after then, and make changes as appropriate (including following
my own suggestions if noone disagrees with them :-p ).

--
Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EnterpriseDB UK: http://www.enterprisedb.com
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