[Discuss-gnuradio] License updated to GPL version 3 or later

[Eric Blossom]

FYI,

I've just updated the license on GNU Radio from GPL version 2 or later
to GPL version 3 or later.

The text of GPL version 3 is here:

  http://www.gnu.org/licenses/gpl-3.0.html

The updated FAQ is here:

  http://www.gnu.org/licenses/gpl-faq.html

Compatibility between various GNU licenses is discussed here:

  http://www.gnu.org/licenses/gpl-faq.html#AllCompatibility

Eric