livenet: module for fetching live images from the network

livenet: module for fetching live images from the network

The livenet module allows you to use a root arg like:

    root=live:http://server.name/path/to/live.img ip=dhcp

The named live image will be downloaded with wget and then set up as the
root device.

It currently supports FTP, HTTP, and HTTPS. dracut will try to install
the CA bundle (/etc/ssl/certs/ca-bundle.crt) into the initramfs so that
SSL certificate checking will work properly.

If an HTTPS URL is given and the site fails the certificate check, the
file will be rejected and the system will not boot into it.

Signed-off-by: Will Woods <wwoods@redhat.com>