Improve UX around removed release binaries

[jlopp]

I needed to run some old versions of Core for backwards compatibility testing with a project and noticed that a number of the Release Announcement pages have broken links. For example, https://bitcoincore.org/en/releases/0.16.0/ links to https://bitcoincore.org/bin/bitcoin-core-0.16.0/

Clearly they have been removed for security reasons #605

However, this is not obvious or user friendly. I'd suggest changing the release announcement pages to be more clear and to link to the secure minor version of the corresponding release.

[harding]

I think I'd prefer just changing everything to say,

The latest version of Bitcoin Core is always available from https://bitcoincore.org/en/download/

Would you find that to be a satisfactory solution, @jlopp? Does anyone have any objection to doing that on this website? Does anyone have an opinion about whether I should upstream that change to bitcoin/bitcoin for future release notes as distributed in other places than just this website?

[jlopp]

Sounds good to me.

[laanwj]

I think the kind of security issues that warrant removing releases are rare enough that we can just consider removing the links for those versions, instead. And I think it's fine to keep direct links otherwise. But no strong opinion.

[l33d4n]

Anyone have a suggestion how to solve this issue?
What do you think about this kind of change?

[katesalazar]

I like all of #672 (comment),
#672 (comment), #672 (comment).
Might code.