[linux-cifs-client] Backport of most current cifs code for 2.6.25 through 2.6.28

[Steve French]

I took the most current cifs (cifs version 1.56) and backported it
with version ifdefs so it would build as a module for any of Linux
kernel versions 2.6.25, 2.6.26, 2.6.27 or 2.6.28 (and confirmed that
it would build on each).  This includes a large number of fixes so may
be useful for some for fix verification or use by those who can't
upgrade to current kernels.  Jeff maintains a more selective backport
for some even earlier kernels, those for RHEL5 and RHEL4
(http://people.redhat.com/jlayton/)

The cifs 1.56 backport for versions 2.6.25 through 2.6.28 is at
http://pserver.samba.org/samba/ftp/cifs-cvs/cifs-1.56-backport-for-2.6.25-2.6.28.tar.gz

An example of the steps needed to build it are:
a) gunzip cifs-1.56-backport-for-2.6.25-2.6.28.tar.gz
b) tar -xvf cifs-1.56-backport-for-2.6.25-2.6.28.tar
c) cd to the root of your kernel source tree
d) make M=~/cifs-test-base
e) insmod ~/cifs-test-base/cifs.ko

If this is helpful, I will post to kernel.org and the Linux cifs project page.
-- 
Thanks,

Steve