nfsstat: standardize naming of server variables

	Standardized Naming 1: Instead of having a variety of different
server-related variable name prefixes ("srv", "svr", "svc", "SVC"), set
them all to "srv" or "SRV".  A subsequent patch will rely on this naming
scheme.

Signed-off-by: David M. Richter <richterd@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>