- Patch things with sed(1) during `post-patch' instead of `pre-patch'
- Fix Lua detection properly (patch corresponding pkg-config(1) calls)
- Offload CONFIGURE_ENV, add work-around for Gentoo bug #316573 (some
messages were misplaced on systems where char is unsigned by default,
e.g. PowerPC)
- Allow add-ons to be placed inside user's home directory
- Drop explicit USE_XORG, improve on comments, do some minor cleanups
ead9c4b39b