Change I572ff682de4cc7ef27bb46dd028d3d797b873841 added the fileserver
callback xstats collection to afsmonitor. Provide some documentation
for these fields, along with the other fields displayed by afsmonitor.
Change-Id: I21618047519fbb28f6707ff9ba95a17fe27e0f3c
Reviewed-on: http://gerrit.openafs.org/1783
Tested-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Russ Allbery <rra@stanford.edu>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
