Groups.io: Changelog

INTERNAL: We now clean up unused RSS feeds in the database.
INTERNAL: On an edited message, check if the digest message exists already before adding it, to prevent postgres log messages.
INTERNAL: Changed nginx log format back to combined to goaccess can parse user agents.
INTERNAL: Work to make it easier to add additional FBL providers.
API: /getevent wasn't obeying the group calendar permissions setting.
NEW: We now parse more information about which message was flagged as spam from an FBL report, and send that out to the user and group owners.
CHANGE: The List-Id email header now includes the group id, to better help us parse FBL reports.

CHANGE: We now automatically delete drafts that are older than two weeks.
INTERNAL: We now reuse SMTP connections when sending email to major providers, instead of opening a new connection for each email.
INTERNAL: On advice from Comcast, subscribed to the Comcast FBL, along with several other FBLs.
SYSADMIN: Upgraded the kernel in the main database machine to a more recent version.
INTERNAL: Added grafana annotations to all cronjobs.
SYSADMIN: Reduced comcast.net karld concurrency from 10 to 5.
INTERNAL: Improved our email monitoring dashboards to better track when providers are not accepting email from us.
INTERNAL: Optimized forcesummaries some more (and again fixed its use of replicas).
INTERNAL: Use db replicas for wiki queries.
INTERNAL: Use db replicas for some auth queries.
SYSADMIN: Upgraded the kernel in db replica machines to a more recent version.
SYSADMIN: Changed when we run the stats process on db05.
SYSADMIN: Added pg_stats_activity counts for db04/db05.

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