daemon: handle freopen() failure
Die if stderr couldn't be sent to /dev/null when operating in inetd mode and report the error message from the OS. This fixes a compiler warning about the return value of freopen() being ignored on Ubuntu 8.10. Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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