The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
Initially, only tag files that use BSD 4-Clause "Original" license.
RelNotes: yes
Differential Revision: https://reviews.freebsd.org/D13133
Approved by: slong scottl@samsco.org
MFC after: 2 weeks
Final cleanup of fwcontrol.
NetBSD compatibility
Cleanup errors in usage() display
Finish up error handling via errx/warnx
Generate error on unparsed command line syntax
Change device(devbase) to open into the form /dev/fwX.X
