testing/s-postgray: 0.8.0
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New --startup mode to allow it to be driven as a standalone daemon.
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"Fixes a miss": if on server startup the socket yet existed (no proper shutdown on last run), startup failed and the missing policy server would cause postfix to refuse acting. Whereas "rm -f PG-SOCKET" in a postfix-startup-script avoids this, it was never announced to be necessary, so henceforth automatize this.
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Robustness against MFILE,NFILE,NOBUF,NOMEM in file/socket open paths.
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