Add missing pre.d directory to let user know they can use such scripts
Preserve console directievs from kernelargs into installed system
Retry umount during image2disk, if processes have the filesystem busy.
Fix DNS behavior during post phase of installtodisk
Invoke confignet properly during firstboot to set up additional interfaces.
Have sshd run during the install from '/sysroot', for convenience
Fix some cosmetic error output for setupssh
