Track fixes for re-introduced src:shibboleth-sp package

The src:shibboleth-sp package was re-introduced in Debian starting with
the 3.0.2+dfsg1-1 version to experimental and later uploaded to
unstable.

Track previous src:shibboleth-sp2 fixes which are now adressed in
src:shibboleth-sp with the first version which landed in unstable.