Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/falkon/versions

firefox-bin with overrideable locale, tested on nixos x86_64

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/lighttpd/versions

Regression introduced by c940053.

The commit introduced declarative docker containers and subsequently
enables docker whenever any declarative docker containers are defined.

This is done via an option with type "attrsOf somesubmodule" and a check
on whether the attribute set is empty.

Unfortunately, the check was whether a *list* is empty rather than
wether an attribute set is empty, so "mkIf (cfg != [])" *always*
evaluates to true and thus subsequently enables docker by default:

$ nix-instantiate --eval nixos --arg configuration {} \
    -A config.virtualisation.docker.enable
true

Fixing this is simply done by changing the check to "mkIf (cfg != {})".

Tested this by running the "docker-containers" NixOS test and it still
passes.

Signed-off-by: aszlig <aszlig@nix.build>
Cc: @benley, @danbst, @infinisil, @nlewo

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/matio/versions

falkon: 3.0.1 -> 3.1.0