1. Modify wolfSSL_CTX_load_static_memory() to use wc_LoadStaticMemory()
   instead of reimplementing it.
2. Initialize the pointers in wc_LoadStaticMemory() to null.
3. Whitespace changes.

1. Add the function wc_LoadStaticMemory_ex(), which is a generic version
   of wc_LoadStaticMemory().
2. Modify wc_LoadStaticMemory() to call wc_LoadStaticMemory_ex() with
   the bucket lists.
3. Rename the function wolfSSL_load_static_memory() as
   wc_partition_static_memory(), make it static, move it higher in the file.

1. Add generic function wolfSSL_StaticBufferSz_ex() where one specifies
   the memory bucket list sizes and distribution.
2. Rewrote wolfSSL_StaticBufferSz() in terms of the new function.
3. Changed the list pointers on wc_LoadStaticMemory_ex() and
   wc_init_memory_heap() to be pointers to const.

1. Add checks for listSz against WOLFMEM_MAX_BUCKETS.
2. Use WOLFMEM_DEF_BUCKETS for the size when using the default memory
   descriptions.
3. Whitespace.

1. Make the function wolfSSL_GetMemStats() public.

1. Added some extra parameter checking to wc_LoadStaticMemory_ex().
2. Added some extra parameter checking to wc_StaticBufferSz_ex().
3. Rename some parameters and add some logging prints.
4. Some static functions have some parameter checking and they are only
   calling in one spot, remove it.

1. Add API test for function `wc_LoadStaticMemory_ex()`.

1. Add API for function `wc_UnloadStaticMemory()` which frees the mutex
   used by the static memory pool.
2. Update the `wc_LoadStaticMemory_ex()` test to free the static memory
   pool's mutex on each successful test case.