According to https://repology.org/repository/nix_unstable/problems, we have a
lot of packages that have http links that redirect to https as their homepage.
This commit updates all these packages to use the https links as their
homepage.
The following script was used to make these updates:
```
curl https://repology.org/api/v1/repository/nix_unstable/problems \
| jq '.[] | .problem' -r \
| rg 'Homepage link "(.+)" is a permanent redirect to "(.+)" and should be updated' --replace 's@$1@$2@' \
| sort | uniq > script.sed
find -name '*.nix' | xargs -P4 -- sed -f script.sed -i
```
This PR is committed using the new version.
The never version requires JRE 10, actually the changelog mentions
downgrading from JDK11 to 10 because of a bug related to https
but this seams to be fixed by now
https://bugs.openjdk.java.net/browse/JDK-8210005
Also I did not find a `jre` output in jdk11, so the closure size
might increase due to it.
Also adapted package's freedesktop item install
script so that it works in the context of nix.
(i.e.: icons and `*.desktop` file now properly
installed by the package).
Michael Reilly