Better/Stable download paths for automated updates

[DanBuchan]

Hi,

I see that the path http://wwwuser.gwdg.de/~compbiol/uniclust/current_release/uniclust30_2018_08_hhsuite.tar.gz isn't stable for using any kind of simple automated update.

It would be useful if there was a persistent URI such as http://wwwuser.gwdg.de/~compbiol/uniclust/current_release/uniclust30_hhsuite.tar.gz that always pointed to the latest release so the latest file could be downloaded in an automated fashion without having to spider the page for the current file name

That is to say /current_release shouldn't be a symlink to 2018_08/ it should be a real directory which contains file symlinks to the current released files.