tcp: base implementation
native: properly indent import
address: simplify Address creation
address/internet?: indent properly
native/create-sockaddr: implement it as a multimethod
native/to-sockaddr: implement it as a multimethod
native: use instance? instead of = class
native/from-sockaddr: implement it as a multimethod
native: add helpers for setsockopt and getsockopt
socket: improve Sendable
tcp: more implementation