Update: Re-design f_socket to better support handling of different struct sockaddr...

Update: Re-design f_socket to better support handling of different struct sockaddr types.

The networking types are already in use, such as address family (AF_*) and protocol family (PF_*).
The known and supported socket address structures (struct sockaddr) do not directly relate to either.
Create a new enumeration that directly maps to these socket address structures (struct sockaddr), called an address form.
A 16-bit integer is hopefully more than is ever needed for this.

Rewrite f_socket_bind() and f_socket_connect() to use the socket.form enumeration.
The custom *_inet4(), *_inet6(), and *_local() functions are removed.

Add a generic, or fallback aka failsafe, type for handling the most basic socket address tructure (struct sockaddr).