nixos: Try harder to get LVM-hosted filesystems up in stage1.
VMs: Add Fedora 17 to the list of distros (only had 16 and 18).
nixos: Make serial agetty's bitrates configurable.
qca2: Update the source of qca-ossl.cpp to qca's git (anonsvn.kde.org no longer
serves it), and bump it to a latest version that builds with our qca version.