global: unsigned int:1 -> bool:1 perl -i -pe 's/unsigned int ([^,:;]+):1;/bool $1:1;/' **/*.[ch]

fts: Send session ID to indexer and indexer-worker for logging purposes.

indexer: Improved handling multiple indexing requests to the same mailbox. If a request arrives for a mailbox that we were already indexes, the previous code simply sent the indexing request to the existing worker process. This could have caused a lot of requests to be buffered to the same mailbox if the indexing took a long time, which could have taken a while to process even though they weren't really doing anything indexing work. The new code instead just keeps track in memory that when the earlier indexing is finished, it's done again once to finish any pending changes.

indexer: Use array.h API instead of writing our own. The space savings aren't worth the extra complexity.

indexer: Added OPTIMIZE command to optimize fts index.

doveadm index: Added -n parameter to specify max number of recent msgs to perform indexing. The idea is that if a user hasn't opened the mailbox for a long time (or ever), there's not much point in wasting time on doing indexing.

indexer: If verbose_proctitle=yes, show how many clients/requests there are.

Added "indexer" service, which uses worker processes to perform queued mailbox indexing. Only a single worker process will index the same user at the same time. This avoids lock waits, especially when doing full text search indexing with backends that require locking.