Make it explicit that dhcpd is not restarted on an error.
Simply ignoring the error and letting dhcpd restart doesn't work because dhcpd_makeconf doesn't actually ever restart dhcpd, rather it relies on the dhcpd_wrapper. But on an error, the wrapper has died as well. So now the error message just says that dhcpd is NOT running and to use the startup script to restart things.
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