Patch from Petr Baudis <pasky@ucw.cz>

This patch (against 2.5.49) updates Documentation/kernel-parameters.txt
to the current state of kernel.  It was somehow abadonded lately, so I
did my best, but it's possible that I still missed some of the options
- thus, if you will notice your favourite boot option missing there,
please speak up.  Note also that I will probably send up another update
after few further kernel releases..

Also, I attempted to introduce some uniform format to the entries, I
added the format description where I was able to find it out and
decypher it, and I also added gross amount of external links to the
headers of the source files or to the README-like files, where the
options are described into more degree.  This way, hopefully this file
has a chance to be actually usable for the users ;-).

There are almost certainly some entries which I missed, it was really a
huge number and the main reason is that some of the boot options don't
use the __setup macro, which I grep'd for.

I hope the patch is ok, there should be no problems with it. Please apply.

Note that this is the fourth submission of the patch - I took the
opportunity and updated the patch from 2.5.48 to 2.5.49.  AFAIK mutt
shouldn't mangle the patch in any way, so it should apply cleanly to
your tree, Linus.