Makes fs getfid error handling consistent with other fs commands

Makes fs getfid error handling consistent with other fs commands

This patch makes the fs getfid command print errors for paths that
can't be handled correctly, instead of quietly ignoring them, and it
also returns an error code if any such paths are encountered.  This
makes the behavior consistent with other fs commands, such as
listquota, whereis, etc.

FIXES 128372

Change-Id: Ibb6e3f6cee5dccbf9347dfa8bfee8776a7552b91
Reviewed-on: http://gerrit.openafs.org/3005
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>