Define extern char** environ so that configuration work compiles on Mac
Define extern char** environ so that configuration work compiles on Mac

charlescearl/VirtualMesos,benh/twesos,charlescearl/VirtualMesos,benh/twesos,benh/twesos,charlescearl/VirtualMesos,charlescearl/VirtualMesos,charlescearl/VirtualMesos,charlescearl/VirtualMesos,benh/twesos,charlescearl/VirtualMesos,benh/twesos,benh/twesos,benh/twesos,charlescearl/VirtualMesos,charlescearl/VirtualMesos,benh/twesos,benh/twesos