doc: quote list items in POD

Recent versions of Pod::Simple complain if we use integers or other
special characters in an =item list. We have a couple bulleted lists
that happen to have integers or other special characters as the list
values. Quote the items with C<> so that Pod::Simple can correctly parse
them again.

Reviewed-on: http://gerrit.openafs.org/9838
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 32d823c52f212fb79816708418ad7d958eb32a01)

Change-Id: Ie3e5c792d64f1d2e973e3a5f68b8466986cde0d7
Reviewed-on: http://gerrit.openafs.org/9842
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jason Edgecombe <jason@rampaginggeek.com>
Tested-by: Jason Edgecombe <jason@rampaginggeek.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Tested-by: Stephan Wiesand <stephan.wiesand@desy.de>