2005-02-03 Andrew J. Schorr <ajschorr@alumni.princeton.edu>

	* log.c: (syslog_sigsafe) Reduce scope of syslog_fd: it is accessed
	  inside this function only.
	  (open_crashlog) New function to open /var/tmp/quagga.<daemon>.crashlog
	  with flags O_WRONLY|O_CREAT|O_EXCL to save some crash info.
	  (zlog_signal,_zlog_assert_failed) Increase logging priority from
	  LOG_ERR to LOG_CRIT.  If no file logging is configured, try to use
	  open_crashlog to create a crash logfile.
	  (zlog_backtrace_sigsafe) If a crashlog file descriptor is open,
	  dump a backtrace to that file.

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