Assorted patches for rawhide

Some RHEL-5 forward ports and some other fixes.

-- 
David Cantrell <dcantrell redhat com>
Red Hat, Inc. / Honolulu, HI

Follow-Ups:
- [PATCH 1/5] dhclient now reads config files from /etc/dhcp
  - From: David Cantrell
- [PATCH 2/5] AC_ARG_WITH -> AC_ARG_ENABLE
  - From: David Cantrell
- [PATCH 3/5] Ignore configure.ac when generating updates.img
  - From: David Cantrell
- [PATCH 4/5] Display drive model and size in MB in partitioning UI (#460697)
  - From: David Cantrell
- [PATCH 5/5] Add missing LAYER2 and PORTNO handling for s390x.
  - From: David Cantrell
- Re: Assorted patches for rawhide
  - From: Hans de Goede