NetStream/NetAddress/NetDevice/NetPacketHeaderMap and EterBase/cipher.cpp
are mechanical copies. The winsock shim maps Winsock onto BSD sockets and
keeps the Winsock semantics CNetworkStream relies on: select ignores nfds,
a socket whose connect failed is not writable (40250 times out instead),
EINPROGRESS reads as WSAEWOULDBLOCK, and SIGPIPE is ignored.
port.net covers loopback connect, send/recv, peer close, the refused
connect timeout and the client/server key agreement.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
