Thoughts
FRICK! I'm in violation of the GNU GPL! Gosh darn it!
Xapian-haystack is distrubuted under GPLv2
=> https://github.com/notanumber/xapian-haystack/blob/master/LICENSE
I maintain and distribute a fork of xapian-haystack
=> https://tildegit.org/matthias/xapian-haystack
GPL also contains a requirement that "You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change." which I didn't do!
Frick!
I might be able to argue in court that I didn't modify the files myself, I only resolved merge conflicts between two already existing forks, but I don't think that would stand up. I would consider that a modification. Dang it!