* precondition plan / version in compaction / store TTL removal independent of local _ttl set
* Agency init loops break when shutting down.
* assertion failures in store on restarting following agents
* Minor porting fixes from 3.4
- Schmutz now called "Maintenance" and completely implemented in C++
- Fix index locking bug in mmfiles
- Fix a bug in mmfiles with silent option and repsert
- Slightly increase supervision okperiod and graceperiod
* Really enforce the hidden option --server.maximal-threads if given.
* Switch off --log.force-direct in scripts/startStandAloneAgency.sh
* Lower the timeout for sending AppendEntriesRPC to 150s.
* Erase _earliestPackage when becoming a leader.
* Challenge leadership in agent main loop.
* Use steady_clock for _earliestPackage.
* Change _lastAcked and _leaderSince to steady_clock as well.
* time difference calculations based on old readSystemClock to steadyClockToDouble
* All system_clock transitioned to steady_clock in Agent. Remaining system_clock are user input / output or timestamps
* Inception system_clock to steady_clock
* Removed unused active(...) method in Agent
* Inception's restart from persistence allows peer with empty active RAFT list to join
* Agency's UUID is persisted outside of the database comparable to coordinator and db server action.
* Publicized Methods to UUID stuff in ServerState
* Inception method documentation
* added --agency.disaster-recovery-id to allow for specification of known former agency id. this is a very dangerous option potentially.
* Delete a unused methods.
* separate _id and _recoveryId
* populating active list with entire pool
* Improve logging.
* reject gossip from unknown agent, if pool is complete
* Switching from ttl to supervision based failover mechanism
* Allowing canceling of ongoing actions
* refactored asyncjobmanager
* refactoring some code
* adding read-only flag
* catching some exceptions to reduce log pollution, removing unnecessary code, removing tests for _changeMode
* fixing "createsANewDatabaseWithAnInvalidUser"
* auth = off does not longer make everyone superuser
* Fixing cluster_sync and maybe resilience
* Send out empty heartbeats regardless of non-empty AppendEntriesRPC.
* Also improve logging:
Note if a log in the empty heartbeat sending takes > 0.01 s.
Clearly mark places where a leader resigns in logging.
Log if no empty heartbeat is sent out.
* Make leader more tolerant w.r.t. incoming AppendEntriesRPC responses.
* Add debug logging for _lastAcked and challengeLeadership.
* Remove some unused code. Do not count ourselves in challengeLeadership.
* Removal of entire activation/deactivation mechanisms in agency
* TRI_microtime up to c++11
* added term to response to sendAppendEntries.
* added debugging methods
* try to fix invalid access in case of error
* remove unused members
* bugfixes and comments
* all agency fixes in
* merge bug
* partially unguarded Agent::lead fixed
* all agency fixes in
* added nrBlocked to thread startup eval
* added nrBlocked to thread startup eval
* recombination of cases in State::get
* some maps replaced with unordered_maps
* optimized maps some