Merge branch reverting the use of Cloudfare-zlib

CMakeLists.txt

builtins/zlib/CMakeLists.txt

builtins/zlib/adler32.c

builtins/zlib/crc32.c

builtins/zlib/deflate.c

builtins/zlib/deflate.h

builtins/zlib/gzlib.c

builtins/zlib/gzread.c

builtins/zlib/gzwrite.c

builtins/zlib/inflate.c

builtins/zlib/trees.c

builtins/zlib/zconf.h

builtins/zlib/zutil.h

cmake/modules/CheckAssembler.cmake

cmake/modules/RootConfiguration.cmake

config/RConfigure.in