Simple single header pure C89 library to take care of freeing many pieces of
memory at once using free plus some small convenience functions around it.
Written mainly for potential use with my small C utilities. You can find them on my GitHub and arranged in a list here: here.
Named "sack" to invoke the image of putting all your buffers in a sack, tying it up and throwing it into the lake to dispose of it.
To use #include "sack.h" and in a single source file that gets compiled
include it after doing #define SACK_IMPLEMENTATION to place implementations
in that file.