Update: Socket bind functions, socket address family enumeration, and rename max_backlog.

Update: Socket bind functions, socket address family enumeration, and rename max_backlog.

Change the f_socket_bind_local() bind function to not call memset() and use the new address structure.
Add f_socket_bind_inet4() and f_socket_bind_inet6() bind functions in a similar way to f_socket_bind_local().

Update the appropriate documentation.
Add the appropriate unit tests.

The name max_backlog for f_socket_listen() is better named backlog_max as per the FLL style practices.