* github-p/feature/prune-users: (21 commits)
[feature/prune-users] $author_id_sql is no longer needed here.
[feature/prune-users] Move quote to the correct line.
[feature/prune-users] Split one line into two lines for readability.
[feature/prune-users] Use empty for checking array size.
[feature/prune-users] Fix issues with queries pointed out by bantu.
[feature/prune-users] Add spaces inside brackets.
[feature/prune-users] Use a map instead of performing array scans.
[feature/prune-users] Fix incorrect condition when deleting log entries.
[feature/prune-users] Non-cosmetic changes per bantu's review.
[feature/prune-users] Cosmetic changes per bantu's review.
[feature/prune-users] Minor UI adjustment and bug fixes
[feature/prune_users] Moved set_config_count out of user loop.
[feature/prune-users] Fixed user id check in undelivered users loop.
[feature/prune-users] Call sql_is_set once for author ids in user_delete.
[feature/prune-users] Replaced missed occurrences of $user_id with $user_ids.
[feature/prune-users] Call sql_is_set for user ids once in user_delete.
[feature/prune-users] Fixed whitespace in language file.
[feature/prune-users] Apply 904bcb86a0.
[feature/prune-users] Adjust some language strings for new features
[feature/prune-users] Apply e6ed55a9c1.
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