* "make clean all test DEPS=''" runs all tests without config.h
* nullptr fails without config.h

[[Imported from SVN: r5371]]

[[Imported from SVN: r4676]]

[[Imported from SVN: r3170]]

[[Imported from SVN: r1474]]

have a look into the extensive Doxygen-docs for details on how to use
those beasts

[[Imported from SVN: r845]]

compiled-in debug-level. For the default streams a common symbol is
needed, otherwise they could not be globally redirected. Thus, libdune
is resurrected

[[Imported from SVN: r822]]