Bug#996540: Post install fails when run as non-root user and does not respect PKG_ROOT

[Glenn Washburn <development@efficientek.com>]

Package: install-info
Version: 6.7.0.dfsg.2-6

The post install is failing when dpkg is configured with a root and run
as an unprivileged user. This is an issue partly with packaging and
partly with the upstream package (I think). The upstream issue can be remedied with a patch in
the packaging.

My suggestion for a fix is to modify update-info-dir such that it takes
an argument (eg. --root <path>) prepend that argument to all file paths
used.  Then in the post install call update-info-dir with $PKG_ROOT as
the argument, eg. update-info-dir --root $PKG_ROOT. Any fix will do
though.

Glenn