zlib support and crypt.h

Hi All, I just noticed that the zlib_support in cocos2d-x is missing the crypt.h

I was able to update the code and add crypt.h from http://programming-practice.googlecode.com/svn/trunk/LevelUp/cocos2d-x/cocos2d-1.0.1-x-0.11.0/cocos2dx/platform/third_party/marmalade/zlib/contrib/minizip/crypt.h to the project to get it working but I would like to know why this functionality is removed from the framework in the first place? Are there any legal / delivery issues?