[OpenAFS-Doc] docbook conversion of QuickStartUnix

[chas williams - CONTRACTOR]

since there has seen some interest in a docbook conversion, i took a
stab at converting some of the existing .htm documentation.

here is a first pass at QuickStartUnix.  its looks pretty good and is
fully indexed.  generating the .pdf with the full index is very slow so
you should only do that after making your changes and are producing a
"final" document.  if someone has a better toolchain for docbook to
pdf (with index support) i would like to hear about it.

ftp://ftp.cmf.nrl.navy.mil/pub/chas/openafs/QuickStartUnix.tar.gz

critiques on the conversion are welcome.  the content is a bit
dated and otherwise goofy (guaranties).