Backporting shibboleth-sp2 2.6.0+dfsg1-4 to jessie: dh-systemd, piuparts and lintian errors

[Niels Thykier]

Etienne Dysli-Metref:
> Hello mentors,
> 
> Since shibboleth-sp2 2.6.0+dfsg1-4 migrated to testing during the
> holidays, I'm now backporting it to jessie. So far there is nothing to
> change, however piuparts gives me the following error (which does not
> appear on stretch):
> 
>> [...]
> 
> So I bumped the build-dep up a bit to: dh-systemd (>= 9.20160709). But
> then a get a lintian error
> 
>> E: libshibsp7: postinst-must-call-ldconfig usr/lib/x86_64-linux-gnu/libshibsp.so.7.0.0
> 
> [...]
> 
> So hmm... any clues? Who's wrong? me, piuparts, lintian or debhelper?
> 
> [...]
> 
>   Etienne
> 

This lintian error:

 * is aimed at stretch or later, and
 * should be ignored for stable and stable-backports

Thanks,
~Niels