Lenny fixes for opensaml2 and shibboleth-sp2

[Scott Cantor]

Russ Allbery wrote on 2009-12-02:
> I believe that it will work that way on some platforms, but Linux has no
> support at the dynamic linker level for both allowing previously-compiled
> binaries to continue to link with the new shared library but requiring
> newly built binaries to use only the newer library and not the older one.

I got the part about the older binaries still working (i.e. it prevents the
SONAME bump), but I see what you mean about the dependency in the new ones.

> I'm inclined to not worry about the Libtool versioning changing for that
> reason, but we will want to add the code required to bump shlibs to ensure
> that no one can install a newer libapache2-mod-shib2 without also updating
> their libshibsp1 package.  And I suppose changing the Libtool versioning
> doesn't really hurt anything, so maybe we should do it anyway just to be
> formally correct.

My advice is to do it because upstream I've moved on from that SONAME, so
you can't conflict anyway.

I appreciate the explanation though, it answered some questions for me and
explained some libtool mailing list threads I wasn't completely following.

-- Scott