Update translations from Transifex.
sparsify: Relax requirement that output device cannot be block device (RHBZ#1122557).

To fix RHBZ#1056290, I prevented virt-sparsify being used if the
output device is a block device.

I have now retested this scenario and it does work (in both copying
and in-place mode), and does not delete the output device, and
therefore we can relax this restriction so only char devices are
banned.

This is useful for oVirt which uses a qcow2 formatted block device to
store virtual machines.
customize: firstboot: Move Linux-specific functions into Linux submodule.

No functional change.
mllib: Add regedit mini-library.

This library replaces Win::Hivex::Regedit, or at least enough for us
to be able to make the simple Registry modifications needed for
installing firstboot scripts.
customize: Add the ability to use --firstboot for Windows guests.

This allows you to add potentially multiple --firstboot
scripts to a Windows guest.
v2v: Add support for converting Windows guests.

This completes commit f296d34f3b30c82309b22b54bf5a2c133992bd93.
aarch64: Add comment about efi-rtc=noprobe option.

This updates commit 5326689d50cc82e9108c83511e666be6d081d9dd.