Bundled zlib helper
I created experimentally implementation for zlib-binding helper of bundled build.
I also maintain ruby-build that is multi-platform build wrapper for ruby. I often got build failure
report caused to missing zlib headers. examples are here.
I hope to resolve this situation for ruby users.
my patch make to build zlib-binding with bundled zlib sources. It only enabled when It was given
--enable-bundled-zlib option with