* agent: support client notices
* improve
* fix, test
* rename
* cleanup
* send and process notices in more cases
* dont delete
* dont remove notice on other permanent errors
* dont remove notice if there is no notice ID in queue
* add server to error
* allow deleting
* only use notice if key hash matches
* agent: subscribe all connections
* query, version
* BoolInt
* add query to errors
* Revert "add query to errors"
This reverts commit 32a1f7fe11.
* fix optional field
* version
* limit number of in-flight subscriptions to 35000
* agent: optimize subscriptions memory usage more (do not store subscribed queues in memory) WIP
* use new session subscriptions data
* version
* remove old data structure
* remove version
* batch deletions
* test TSessionSubs
* comment