[RELEASE] Released version 1.3.12.3 with the following main changes :

[RELEASE] Released version 1.3.12.3 with the following main changes :
    - add the "nolinger" option to disable data lingering (Alexandre Cassen)
    - fix double-free during clean exit (Krzysztof Oledzki)
    - prevent the system from sending an RST when closing health-checks
      (Krzysztof Oledzki)
    - do not add a cache-control header when on non-cacheable responses
      (Krzysztof Oledzki)
    - spread health checks even more (Krzysztof Oledzki)
    - stats: scope "." must match the backend and not the frontend
    - fixed call to chroot() during startup
    - fix wrong timeout computation in event_accept()
    - remove condition for exit() under fork() failure