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Description of problem:

Previous behavior of libnfsidmap was to do a name lookup of
nobody@DEFAULTDOMAIN (for both user and group), which does not match
the behavior of rpc.idmapd.

This patch makes libnfsidmap respect Nobody-User/Nobody-Group for
lookups, thus making the nfsidmap utility properly handle the case if
nobody@DEFAULTDOMAIN does not directly map to any user/group on the
system.


How reproducible:
100%

Steps to Reproduce:
1. Uncomment Nobody-User in /etc/idmapd.conf and set it to a value
2. Do a NFSv4 mount.
3. See what value is used when there is no valid id/gid mapping

Additional info:

commit f139de79d91e7773b5b98fe5aca5570f77c7aee9
Author: Christian Seiler <christian>
Date:   Wed Aug 13 12:42:14 2014 -0400

    libnfsidmap: respect Nobody-User/Nobody-Group

*** Bug 1093093 has been marked as a duplicate of this bug. ***

Verified:
  beaker job: https://beaker.engineering.redhat.com/jobs/843419

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-0575.html