s2ecmd: Clarify error message about wrong argument number.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
cosmetics: Fix some stray double-star comment end markers.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
docs/ImageInstallation: Caution against buggy virtio NIC in QEMU.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
docs/ImageInstallation: Clarify meaning of DBT abbreviation.

Signed-off-by: Diego Biurrun <diego@biurrun.de>