SpamPD v2.60

[mpaperno]

This version brings quite a few changes, though the base functionality and compatibility is unchanged
(minor exceptions noted below). Testing/close observation of this new version is recommended!

~ Performance and diagnostic improvements, quicker startups, and a lot of documentation updates.
+ Add support for configuration files (examples included in /misc folder and in POD).
+ Add optional "scalable mode" using Net::Server::PreFork module (16-year TODO!). More info in POD.
+ Add --logfile option to control logging destination(s) (syslog, stderr, and/or file/device).
+ Add --logident, --logfacility options for syslog.
+ Add multiple levels of help, including full "man" output with optional HTML formatting.
+ Add --show argument for printing default option values and other debug.
* Fix SpamAssassin debug logging with versions 3.1+ (output was going to stderr/wrong syslog/null).
* Fix for IPv6 addresses being used on --host and --relayhost options (was not possible due to ":" check).
! SIGHUP will now reload SpamAssassin and SpamPD configuration files, still with graceful child process shutdown.
! Use SpamAssassin::Logger module (with SA 3.1+) for all logging. This now inits logging much earlier.
! Log to stderr by default if running non-daemonized (with --nodetach).
! Child processes are now renamed to "spampd child" to distinguish them from the parent in task lists.
! Now requires Net::Server v0.89+ (though latest 2.009 is recommended).
! The --auto-whitelist option is no longer allowed with SpamAssassin v3+.
~ Improve --debug option, adding ability to specify SpamAssassin (v3.1+) debug areas (aka channels/facilities).
~ All boolean options can take 0/1 argument and be negated with "no-" prefix.
~ The --children (-c) option is now more formally named --max-servers (-mxs), but still accepted.
~ IO::Socket::UNIX and ::IP are only required if actually needed for --relaysocket / --relayhost options.
~ SpamPD can now be loaded w/out executing eg. for unit tests or other uses. Much more modular code in general.

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This discussion was created from the release SpamPD v2.60.