explain BLOCKED in more detail.


git-svn-id: http://www.nlnetlabs.nl/svn/nsd/trunk@3784 a26ef69c-88ff-0310-839f-98b793d9c207
fix make outside of source directory.


git-svn-id: http://www.nlnetlabs.nl/svn/nsd/trunk@3785 a26ef69c-88ff-0310-839f-98b793d9c207
fixup makefile.


git-svn-id: http://www.nlnetlabs.nl/svn/nsd/trunk@3786 a26ef69c-88ff-0310-839f-98b793d9c207