dmidecode: add license.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
pciutils: add license.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
udpxy: add license.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>