Relicensing Krita as LGPLv2+

[Boudewijn Rempt]

Hi,

Umpteenth draft of this mail, but I think we should consider relicensing
the GPL code in Krita to LGPL.

One reason is that now that Krita is on its own, the mix of LGPL library
code inherited from koffice/calligra and GPL library code inherited from
Krita makes it hard to move code around; like we just did in the svg
branch, creating the kritacommand library from code from krita/image
and libs/kundo2. That code needs to be relicensed to LGPL before we
merge the branch, of course.

Another reason is that there are too many macOS users who get confused
when they install an application that's not in the app store, and we 
cannot publish GPL software in the app store. I wish I could just shrug
that off, and I've done that until 3.1, but it's getting quite a 
support burden.

I haven't found a script yet that will figure out who owns copyright
on the original GPL'ed krita code only -- running things like git fame
only works on the whole repo, most of which is LGPL already...

-- 
Boudewijn Rempt | http://www.krita.org, http://www.valdyas.org