Description of problem:
Referrals that use IPv6 addresses, mount hangup:
[22:21:15 root@ /mnt/tests/CoreOS/nfs-utils/Regression/bz820737-fix-referrals-that-use-ipv6-addresses]# timeLimitRun 180 mount -vvv -t nfs4 $serv:$expdir $mntdir
{WARN} cmd[mount -vvv -t nfs4 localhost:/exports /nfsmp] timeOut!
/mnt/tests/kernel/Library/base/lib.sh: line 135: 10129 Terminated              sh -c ": $cmdId; $*"
:: [   FAIL   ] :: Running 'timeLimitRun 180 mount -vvv -t nfs4 $serv:$expdir $mntdir' (Expected 0, got 143)
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[22:24:18 root@ /mnt/tests/CoreOS/nfs-utils/Regression/bz820737-fix-referrals-that-use-ipv6-addresses]# tail -n20 /var/log/messages
Nov 25 22:24:18 ibm-dx360m4-02 rpc.gssd[754]: ERROR: can't open /var/lib/nfs/rpc_pipefs/nfs/clnt5/info: No such file or directory
Nov 25 22:24:18 ibm-dx360m4-02 rpc.gssd[754]: ERROR: failed to read service info
...
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The log of beaker job:
http://lab-02.rhts.eng.bos.redhat.com/beaker/logs/tasks/17560+/17560706/TESTOUT.log

Version-Release number of selected component (if applicable):
------------------------------------------------
TimeInfo  : 2013-11-25 22:21:11
CaseName  : /CoreOS/nfs-utils/Regression/bz820737-fix-referrals-that-use-ipv6-addresses
$HOSTNAME : ibm-dx360m4-02.rhts.eng.bos.redhat.com
DistroInfo: RedHatEnterpriseWorkstation 7.0 : RHEL-7.0-20131122.0
kernelInfo: Linux ibm-dx360m4-02.rhts.eng.bos.redhat.com 3.10.0-53.el7.x86_64 #1 SMP Mon Nov 18 11:28:22 EST 2013 x86_64 x86_64 x86_64 GNU/Linux
packageInfo
	libnfsidmap-0.25-7.el7.x86_64
	nfs-utils-1.2.9-0.3.el7.x86_64
------------------------------------------------

How reproducible:
100%

Steps to Reproduce:
1. http://lab-02.rhts.eng.bos.redhat.com/beaker/logs/tasks/17560+/17560706/TESTOUT.log
2.
3.

Actual results:
mount hangup

Expected results:
all is OK

Additional info:
  run in RHEL6.5 works fine:
  https://beaker.engineering.redhat.com/jobs/551550