A foreign connection id, a malformed frame, a sender no Connect admitted, a
Connect with the peer table full, and any packet the session refuses ended
the transport loop with an Err. Odin died twice this way after nginx reloads
moved its UDP flows (require_connection: connection id does not match).
The hub and the socket transport now drop such packets and count them in
CultNetTransportStats::packets_dropped. Only socket I/O errors leave the
loop. The socket transport checks the connection id before it touches the
peer endpoint or session, so a stray Connect can no longer move the endpoint
or reset the session.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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