
* Add optional packages Zlib and Zlib-devel. * Simplify the build feature section for zlib and also extract the source package. * Replace all remaining references to the zlib instance in the tree and remove it.
* Add optional packages Zlib and Zlib-devel. * Simplify the build feature section for zlib and also extract the source package. * Replace all remaining references to the zlib instance in the tree and remove it.