I have become aware of Apache's decision about whether this license
meets their own freeness requirements, which of course are different
than Debian's:
https://issues.apache.org/jira/browse/LEGAL-303?focusedCommentId=16088663&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16088663
Apache has decided, reportedly based in part on talks with Facebook
lawyers, that the PATENTS text license cannot be separated from the
BSD-like terms, and that the license as a whole does not meet their
requirements. They will not allow it in new projects, and cease
allowing it in released products after August 31, 2017.
Jeff