apport leaks hostname

Apport leaks the machine's hostname in the log files when uploading logs to Launchpad.

File CurrentDmesg.txt has the line:
[ 6.690523] systemd[1]: Set hostname to <foo>.

File XorgLog.txt and XorgLogOld.txt has the line:
[ 293.791] Current Operating System: Linux foo 4.10.0-14-generic #16-Ubuntu SMP Fri Mar 17 15:19:26 UTC 2017 x86_64

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: apport 2.20.4-0ubuntu2
ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3
Uname: Linux 4.10.0-14-generic x86_64
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME-Classic:GNOME
Date: Sat Mar 25 11:21:04 2017
InstallationDate: Installed on 2013-12-26 (1184 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)