pkgs/tools/security/seccure: store the expression in a file called "default.nix"
all-packages.nix: strip trailing whitespace
all-packages.nix: avoid breaking syntax highlighting in Emacs
lua-5.1: fix $prefix in installed pkgconfig file
lxc: update to current git HEAD 1.0.0.alpha1-92-g8111adf

The developers claim that the new version works on systemd-based hosts.