Suricata

The config of streamTcp parsed at function StreamTcpInitConfig in
Suricata-Main.

Bug streamTcp tread init at function StreamTcpThreadInit in
capture-Thread, such as AFPacketeth21.

If capture-thread run first after spawning, It will lead to
streamTcp don’t prealloc any sessions.

This issue don’t affect the function, but I think it will reduce
performance when process tcp flow.

Details:
1. all theads spawn and call the init functions the the new thread, and the main thead wait the child thread init done. See function TmThreadSpawn in tm-threads.c
2. in the main thread, the module of streamtcp init the config after all the work threads spawn. See function StreamTcpInitConfig called in suricata.c .

Above, it make the stream_config.prealloc_sessions get an uninitialized value in function StreamTcpThreadInit(the streamtcp module's init function).