net-mgmt/unifi-devel: Update to 5.9.32

• Set LICENSE. As this software is released under EULA I am not sure that we can still package it as we used to.
• Use ${AR} instead of /usr/bin/ar in EXTRACT_CMD.

PR: 232199
Submitted by: Bryce Edwards <bryce@bryce.net> (maintainer)
Reviewed by: krion
Approved by: krion (mentor)
Differential Revision: https://reviews.freebsd.org/D18683