TODO.md

• Mark suitable pointers with the restrict keyword
• Extract the client disconnect logic into a separate function
• Implement a proper memory strategy that doesn't impose a limit on the number of connected users and, if possible, doesn't require that much mutually-exclusive access from different threads (i.e. one that's more multithread-friendly)
• Use a memory pool for the message buffers
• Implement another strategy using AcceptEx instead of accept
• Send messages asynchronously (i.e. use WSASend instead of send)