[RFA/GPLv3] Add COPYING3 to gdb

[Joel Brobecker]

> > > Why COPYING3? why not just COPYING?
> > 
> > One reason is that there are some files which refer to COPYING whose
> > license text we can not change.  For instance, parts of sim are
> > copyright Andrew Cagney rather than the FSF - and I believe other
> > simulators are copyright various corporations.  They're all "version 2
> > or later", so it is not a problem, but we do not have authority to
> > change the license statements in them.
> 
> Sorry, I still don't get it: if those files refer to COPYING and are
> "version 2 or later", then it sounds like having GPL v3 in a file
> named "COPYING" is actually TRT to do, isn't it?

The files don't refer to COPYING, they refer to the GPL license v3
or later.

-- 
Joel