fai-class: lower hostname for class list.

As DNS names are specified case insensitive (RfC 4343), and these
should match our hostnames.  Lowercase the hostname for the FAI
class match, as some of our broken DHCP servers deliver mixed-case
hostnames.
Revert "add NFS v4 support"

This reverts commit 608e4ca2a0e421da0fcf6a2358148c8676cbeba1.
Move into lhm component and fix depends.

Adds devscripts for the bashism checks and drops live-* packages from
the fai-nfsroot package, as we use our own initramfs scripts for NFSv4,
watchdog and unionfs support.
debian/changelog: add entry with new version.
Merge branch 'lhm' into lhm-merged