memsec

I have not tested this library in Windows, it may contain insecurity implementation.

If the code have any issue, please remind me.

• [x] memcmp
• [x] memset/memzero
• [x] mlock/munlock
• [x] mprotect
• [x] alloc/free

ref

• Securing memory allocations
• rlibc
• aligned_alloc.rs