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.

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.

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.

Add the Data::Dumper and overload perl modules to fix dependency issues
with liblocsetup.

Added a makefile to build the toolchain via buildroot.  Everything now
depends on the toolchain having been built, so a simple 'make' should
build everything.

Added patches to change getline() to _getline() in Linux's and uClibc's
unifdef build utility.  This fixes compile errors on recent glibc
versions that define their own getline() function.

Modified /init to parse /proc/cmdline for console devices.  Each
'console=' parameter is parsed and each serial device (ttyS* or
ttyUSB* for now) specified is used to generate an /etc/inittab entry
that starts a getty on that device.  The baud rate is parsed as well,
but defaults to 115200 if not specifed.  Parity and data/stop bits are
assumed to be N-8-1.

The specified device is also added to /etc/securetty if not already
present.

The init script for Dropbear will now convert OpenSSH format
host keys to the Dropbear format if they are found at startup.

/etc/ssh/ssh_host_rsa_key -> /etc/dropbear/dropbear_rsa_host_key
/etc/ssh/ssh_host_dsa_key -> /etc/dropbear/dropbear_dss_host_key