Bzip2 official website
The sourceware project isn't new. It is old before the original bzip.org site and it's latest version is 1.0.2. This project was created in order to have an active place for the current library and I used SorceForge because the bzip.org site points to SourceForge for the download. Neustradamus is working on moving the active development to github.
Add ac-wrapper package
Add autoconf2.13 package
Add license exception and include also provides
Add autoconf-archive package
Use a version named package to emulate the Cygwin setup delivery
Add @TODO message for check() and comment out the make check since it fails