- Add missing object files to wssshc target in configure.sh
- Include libwsssht/control_messages.o and libwsssht/data_messages.o in wssshc linking
- Resolve undefined reference errors for:
  - send_registration_message
  - send_ping_frame
  - send_pong_frame
  - send_tunnel_data_message
  - send_tunnel_response_message
- Update configure.sh to generate correct Makefile with all required dependencies
- Ensure wssshc builds successfully with all message functions available

This fixes the ld linker errors that were preventing wssshc from building properly.