debian/rules
	5.12.4 - 5.14.2
		new ENV VARs:
			BUILD_ZLIB
			ZLIB_INCLUDE
			ZLIB_LIB
		new code to "remove dpkg-buildflags effects from %Config"
			in an "if" block
	5.14.2 - 5.16.0
		no change
	5.12.4 - cross
		sets DEB_{BUILD,HOST}_GNU_TYPE
		sets new ENV VARs according to build type:
			HOST_PERL, PERL_TO_USE, HOST_PERL_LIBS, HEADER_DIR, OBJCOPY, STRIP
			INCLUDE, LIB
		sets old ENV VARs according to build type:
			BZIP2_INCLUDE, BZIP2_LIB
		changes to use new ENV VARs
		if cross:
			copies in config.h, uudmap.h, bitcount.h, Configure.cross
			executes Configure.cross
	notes
		patch will apply fairly cleanly
		just move ZLIB_INCLUDE and ZLIB_LIB (currently unused) into "if" block
Makefile.SH
	5.12.4 - 5.14.2
		451-line diff
	5.14.2 - 5.16.0
		523-line diff
	5.12.4 - 5.16.0
		813-line diff