Added enhanced connection handling to fix issues with both initial connections and TLS session resumption:
1. Improved debugging for connection setup with detailed logging
2. Added explicit timeout for backend connections to prevent hanging connections
3. Enhanced error recovery for connection failures with faster client notification
4. Added detailed session tracking to maintain domain context across TLS sessions
5. Fixed handling of TLS renegotiation with improved activity timestamp updates
This should address the issue where initial connections may fail but subsequent retries succeed,
as well as ensuring proper certificate selection for resumed TLS sessions.
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Co-Authored-By: Claude <noreply@anthropic.com>
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