hostnamed should not print warning about nss-myhostname

[Marc Deslauriers]

Currently hostnamed prints the following error in syslog:

systemd-hostnamed[24508]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!

Since nss-myhostname was rejected as being the right approach in https://bugs.launchpad.net/ubuntu/+source/libnss-myhostname/+bug/1162478/comments/6 , we should not print the warning message in the LTS release, even if hostnamed doesn't currently modify /etc/hosts (LP: #1162475).

Can we please patch this warning out to prevent users from thinking something is wrong on their system and leading them to install libnss-myhostname?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: systemd-services 204-5ubuntu10
ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
Uname: Linux 3.13.0-5-generic x86_64
ApportVersion: 2.13.2-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb 7 12:12:20 2014
InstallationDate: Installed on 2013-11-26 (72 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: systemd
UpgradeStatus: Upgraded to trusty on 2014-01-17 (20 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Josh (majik)]

Problem continues to exist on 14.10.

[Spectrumknight (spectrumknight)]

still having this awkward warning...

[Marcus (elect-tech)]

 It is still affecting 14.04LTS. Is this opening any security holes?

[Nick Demou (ndemou)]

This is _not_ a duplicate of bug #1162475 (titled "Changing hostname doesn't update /etc/hosts")