package openssh-server 1:7.1p1-6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

Update failed because of X11 forward setting in config, after commenting it, update proceeded without failure

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: openssh-server 1:7.1p1-6
ProcVersionSignature: Ubuntu 4.3.0-5.16-generic 4.3.3
Uname: Linux 4.3.0-5-generic x86_64
ApportVersion: 2.19.3-0ubuntu2
Architecture: amd64
Date: Mon Jan 11 16:28:18 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-08-03 (161 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.18.3ubuntu1
 apt 1.1.10
SourcePackage: openssh
Title: package openssh-server 1:7.1p1-6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2016-01-04 (7 days ago)