make_release_full: use unique filenames for the dev and release changelog files
make_release_full: use unique filenames for the dev and release changelog files

OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2