The previous url is gone.
$(eval $(call import.CONTRIB.defs,BZIP2))
BZIP2.FETCH.url = https://download.handbrake.fr/handbrake/contrib/bzip2-1.0.6-official.tar.gz
-BZIP2.FETCH.url += http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz
+BZIP2.FETCH.url += https://sourceforge.net/projects/bzip2/files/bzip2-1.0.6.tar.gz
BZIP2.FETCH.sha256 = a2848f34fcd5d6cf47def00461fcb528a0484d8edef8208d6d2e2909dc61d9cd
BZIP2.FETCH.basename = bzip2-1.0.6-official.tar.gz
BZIP2.EXTRACT.tarbase = bzip2-1.0.6