Recently I modified Grub's linux initrd loader to append a cpio
archive containing the cached PXE DHCP ACK packet to the loaded
initrd/initramfs.  The Linux MFS now looks for this file when
configuring the network, and will use it to configure the interface
instead of sending out DHCP DISCOVER requests.  If the file is not
found then DHCP will be used to configure the control net interface.

Once we determine which modules we need, parse the actual .ko files for
'firmware=.*' strings.  These provide the path(s) to that module's
firmware, relative to /lib/firmware.  Remove all firmware from the
output directory then copy in only the files we need.

Add '-c' option to gen_initramfs.sh to choose the compression type.
Currently, it supports the following types: gzip (default), bzip2, lzma,
and none.

The toplevel Makefile now has a variable to specify the compression type
of the initramfs, and passes it to gen_initramfs.sh.  Currently it is
set to lzma by default.

The following components of the Linux MFS were updated:

Linux kernel => 2.6.32.9
buildroot => 2010.02
uClibc => 0.9.30.2
busybox => 1.16.0
binutils => 2.20
gcc => 4.2.4
gmp => 4.2.4

The Dell Optiplex reboot patch was removed from the kernel build as it
is already present in 2.6.32.9.

The update was done because:
- The kernel was over a year old and significant updates have happened
  since then.
- A few new useful features were added to busybox
- The kernel now supports bzip2 and lzma compression for itself and
  initramfs in addition to gzip.  Using lzma instead of gzip saves us at
  least 1.5 MB for the kernel+initramfs, possibly more.

The toolchain build should be dependent on an actual file to ensure we
don't rebuilt it for every target that goes into the initramfs.

Also rename old fake tcsh to tcsh.fake, and run a new script that
symlinks tcsh and csh to tcsh.fake if tcsh doesn't exist.  This way tcsh
can be removed from the build but tcsh/csh users can still log in.

Increase the buffer size for parsing passwd and group entries to 1024
bytes from the default 256.

Set the hostname based on project and experiment name using
sethostname.dhclient as we do on other images.

The wget build for the Linux MFS failed because it target depended on
the wrong path for the compiled wget binary.