MKFree
#define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m); }
#define MKFree(m) Free(m, radix_mask_cache)
#define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);}