Add 2-clause BSD license.
Add 2-clause BSD license.

Approved by:	David Kirchner <dpk@dpk.net> (initial author)
Requested by:	Otto Moerbeek <otto@drijf.net>
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase