The following files were highlighted as being incompatible BSD 4-clause license (http://www.apache.org/legal/resolved.html#category-a) by PMC member Justin Mclean. He also provided a link (ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change) indicating the advertising clause has since been rescinded and this might not be an issue. This needs to be validated.
The third clause should be replaced as follows:
Here is an external example of it's use: http://code.metager.de/source/xref/busybox/libbb/progress.c