download: use downstream packages for Fedora & EL

See merge request !95

Our package repositories for Fedora & EL aren't very useful, since we
keep up-to-date packages in downstream. They're delayed only by
downstream gating, which users can get around by using the appropriate
testing repositories.

This change was also prompted by lack of proper OBS buildroot for EL8
which lacks the needed powertools repo with libuv-devel.

release 5.3.2

See merge request !94

release 5.3.1

See merge request !93

release 5.3.0

See merge request !92

pkg: install directly from Arch Linux repos

See merge request !91

Dynamically change the year in the tagline

See merge request !90

We just have redeploy using the CI.

release 5.2.1

See merge request !89

kill all relative links

See merge request !88

Using href="foo/" is risky, as it only really works the way "we expect"
in the root, so let's use href="/foo/" everywhere instead.

add new contact page

See merge request !87

release 5.2.0

See merge request !86

update signing keys

See merge request !85

release 5.1.3

See merge request !84

development: remove GPG key expiration dates so we do not need to update them

See merge request !83

gitlab URL change to gitlab.nic.cz

See merge request !82

release 5.1.2

See merge request !81

v5.1.1: make link to NXNSAttack blog more explicit

See merge request !79

v5.1.1: add link to NXNSAttack blog

See merge request !78

release 5.1.1

See merge request !77