Dependency testing

[maandree]

When proofreading it should be possible to build in a chroot environment
with only the decleared make dependencies. Than it should be possible
to manually test the program with only the declared runtime dependencies,
with each optional dependency optionally included. ldd could also be used
to find some dependencies (before stripping and compressing).

For each dependency, all available versions as well as exclusing, should
be tested, so that false inclusions and incorrect version range can be detected.
To make the time complexity reasonable, only one dependency is changed
at one time.