dsync: Add hashed_headers setting This makes it possible to configure them

dsync: Try to commit transactions every dsync_commit_msgs_interval messages This was first attempted to be implemented by ec0cc8fa647794e44a1afaa448f495a713048dc4, but it was later partially reverted by 5973d496b16721af6d2c1fa90b016aacddf13554. This current commit should fix its problems.

dsync: When logging "Mailbox changed caused a desync", log also the reason. The reason is usually somewhere in the debug logs, but it's difficult to find from there.

doveadm-sync: Add end-date support

doveadm sync/backup: Added -S <max size> parameter to skip too large mails.

dsync: Add support for features Add empty_header_workaround as first feature

dsync: Added DSYNC_BRAIN_FLAG_NO_NOTIFY to enable MAILBOX_TRANSACTION_FLAG_NO_NOTIFY It's arguable that this should be enabled by default, but people might like to keep mail_log notifications for dsync.

dsync: Added -D parameter to disable mailbox renaming. The renaming logic is annoyingly complex and there are some bugs left in it. With this parameter renames are never even attempted, but instead a rename would be done (slowly) with mailbox delete + create + fill. Although with imapc protocol mailbox renames are rarely detected anyway.

dsync: Use storage's mail_error to choose the doveadm exit code. Instead of always assuming that all errors are EX_TEMPFAIL.

dsync: Added -F parameter to sync only mails with[out] specific flag.

dsync: If same GUID already exists in storage, try to copy it instead of recreating the mail. This way most mailbox backends can reduce disk space by only doing a reference count update. This feature isn't enabled by default. A virtual "All Mails" mailbox needs to be configured using the virtual plugin. Then you need to give this mailbox as -a parameter, e.g.: doveadm sync -a "Virtual/All Mails" ... Currently this is implemented by reading through all the GUIDs in the virtual mailbox. This of course isn't very efficient for things like incremental replication. An upcoming conversation plugin will keep track of all the mails' GUIDs, so in future replication should be able to have this functionality efficiently as well.

dsync: Added -t <timestamp> parameter to save only mails newer than <timestamp> If one side has old mails that don't exist on the other side, they are ignored (not synced and not deleted).

dsync: Added DSYNC_BRAIN_FLAG_NO_MAIL_PREFETCH to avoid opening mails unnecessarily.

dsync: Moved all doveadm-specific code to doveadm-dsync.c

dsync: If dsync was started via doveadm-server, show the remote client's IP address in ps output.

dsync: Support multiple -n parameters.

dsync: Added -P parameter to do a purge for the remote storage after syncing.

dsync: Added -1 parameter to do a "one way sync" without reverting changes. This can be useful during migration when you don't want to delete any mails, but you also don't want to send changes to the old server either.

dsync: Don't try to find mailboxes from unwanted namespaces.

dsync: If verbose_proctitle=yes, show the current state in it.

dsync: If unexpected changes happened during sync, log a warning and exit with code 2. This was done by v2.1 dsync, but the code got temporarily lost in v2.2.

dsync: Added -x parameter to exclude mailboxes from sync. Multiple -x parameters can be added. Giving \flag as parameter means that the mailbox with the given SPECIAL-USE \flag is skipped. For example: doveadm sync -x '\All' -x '\Flagged' -x '\Important' mdbox:~/mdbox

dsync: Small code cleanup.

dsync: -U parameter never updated replicator's full_sync state.

doveadm sync/backup: Added -g <guid> to sync only the specified mailbox (by GUID) Similar to -m <mailbox name>.

dsync: -m '' parameter now syncs mailbox list, but no actual mails.

dsync: Renamed -a parameter to -N. It also now skips invisible namespaces.

dsync: -l parameter locking is now done on the server with "lower" hostname. This allows running multi-master replication on two servers without two dsyncs mixing up changes by running at the same time.

dsync: Automatically figure out which mailboxes can sync with message GUIDs.

dsync: Renamed "guid_requests" to "mail_requests" The mails aren't necessarily requested by their GUID.

dsync: Added back support for syncing only one mailbox (-m parameter)

dsync: Added -a parameter to sync all namespaces, not just the default one.

dsync: Added debugging and rawlogging support.

doveadm sync/backup: Added -s <state> parameter to do a fast stateful sync. Initially use an empty string for the input state. The output state is written to stdout.

doveadm: "backup" command is working again.

dsync: Renamed "slave" to "ibc" (= inter-brain communicator)

Initial version of dsync rewrite. * doveadm backup not implemented at all yet * syncing mailbox renames is somewhat broken (at least renaming \noselect mailboxes) * saving/restoring "state" is implemented by dsync brain, but not by doveadm. this should be easy to do, just need to figure out how the replication code wants it.

Merged dsync into "doveadm dsync". dsync symlink is installed for backwards compatibility.