- added explicit arm64 target, and clang tool options to Windows' configure.bat - configure.{bat,rc} now writing Makefile.config, for consistency/compatibility (e.g. configure.bat can now be used to set up env flags for a non-nmake toolchain) - simplified/decluttered Windows and Plan9 configure scripts (removal of unused/stale options, ...) - removed stale test/makepkg.sh helper

Daniel Adler <dadler@uni-goettingen.de>
Tassilo Philipp <tphilipp@potion-studios.com>
Olivier Chafik <olivier.chafik@gmail.com>
Erik Mackdanz <erikmack@gmail.com>
Masanori Mitsugi <mitsugi@linux.vnet.ibm.com>
Bernhard Urban-Forster <beurba@microsoft.com>