Refactor configure_sigint_handler out

    startup_timer.record("TLS")

def configure_sigint_handler():

    # make the program just exit at ctrl+c without waiting for anything

    def sigint_handler(sig, frame):

        print(f'Interrupted with signal {sig} in {frame}')

        os._exit(0)

    if not os.environ.get("COVERAGE_RUN"):

        # Don't install the immediate-quit handler when running under coverage,

        # as then the coverage report won't be generated.

        signal.signal(signal.SIGINT, sigint_handler)

def initialize():

    fix_asyncio_event_loop_policy()

    validate_tls_options()

    configure_sigint_handler()

    check_versions()

    extensions.list_extensions()

    startup_timer.record("extra networks")

    # make the program just exit at ctrl+c without waiting for anything

    def sigint_handler(sig, frame):

        print(f'Interrupted with signal {sig} in {frame}')

        os._exit(0)

    if not os.environ.get("COVERAGE_RUN"):

        # Don't install the immediate-quit handler when running under coverage,

        # as then the coverage report won't be generated.

        signal.signal(signal.SIGINT, sigint_handler)

def setup_middleware(app):