Use HTTPS for licences if available

[games647]

I checked if the links in the licenses are reachable with HTTPS (including if they have valid certificate). If they are I changed the url to use HTTPS, but kept the other ones to plain HTTP like: http://www.wtfpl.net/

[mlinksva]

@games647 good idea for the links in frontmatter, thanks. But I'd rather not change license texts at all. Could you update this to only change frontmatter links?

[games647]

But I'd rather not change license texts at all.

Should I then change the text of the unlicense too, because the original version contains only a HTTP link?

choosealicense.com/_licenses/unlicense.txt

Line 53 in c229dcc

For more information, please refer to <https://unlicense.org>

vs

https://unlicense.org/UNLICENSE (without HTTPS)

[mlinksva]

@games647 yes and thank you!

I shouldn't have merged #520 -- I remember thinking the change was to the frontmatter, but obviously was only seeing what I thought I should see. 😳

[games647]

Done

[mlinksva]

Thanks again. Annoying that this is consistently happening in CI-run tests:

• ./_site/existing/index.html

• External link https://www.openbsd.org/policy.html failed: response code 0 means something's wrong.
  It's possible libcurl couldn't connect to the server or perhaps the request timed out.
  Sometimes, making too many requests at once also breaks things.
  Either way, the return message (if any) from the server is: SSL connect error

Though https://www.ssllabs.com/ssltest/analyze.html?d=www.openbsd.org obtains an 'A' rating.

I'll go ahead and merge as it seems that if there's a problem, it's with the test environment.

[games647]

It could be because it's a let's encrypt certificate and the certificate storage on travis isn't up to date to support let's encrypt.