Edit: /usr/share/doc/apr/NOTICE (527B)
Apache Portable Runtime
Copyright (c) 2000-2017 The Apache Software Foundation.
This product includes software developed at
The Apache Software Foundation (http://www.apache.org/).
Portions of this software were developed at the National Center
for Supercomputing Applications (NCSA) at the University of
Illinois at Urbana-Champaign.
This software contains code derived from the RSA Data Security
Inc. MD5 Message-Digest Algorithm.
This software contains code derived from UNIX V7, Copyright(C)
Caldera International Inc.