vlserver: VL_GetEntryByName* requests undercounted

vlserver: VL_GetEntryByName* requests undercounted

Commit a14e791541bf19c6c377e68bc2f978fba34f94b1
refactored and corrected the counting of requests and aborts.
However, it inadvertently introduced a new undercount for
VL_GetEntryByName* requests, counting them only if
NameIsId(volname), e.g. volname="536870911".

Ensure that the normal case of a non-"numeric" volname is
also counted.

Discovered during review of pullup to 1.6.x.

Reviewed-on: http://gerrit.openafs.org/12106
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit 670381aa5d3a7bc91ad74c7499605cca2c33d612)

Change-Id: Ic41f8775e4897efe5f6280b56d06d733865556a2
Reviewed-on: https://gerrit.openafs.org/12113
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>