Plain http(s)-links in markdown not rendered

[andreasabel]

See e.g. https://hackage.haskell.org/package/BNFC-2.9.4/candidate:
Links like https://bnfc.readthedocs.org/en/latest/ (under heading Documentation) are not rendered as links. (Note that github does render such links.)

[andreasabel]

@gbaz: To see the change, I suppose the server needs to be relaunched. When does this happen (and who does it)?