* Fix Foxx queue registration
Multiple registration of the same queue was possible. The queue document in _queue was saved multiple times with the same key/id
* Add additional foxx queue test
* add "cluster selectivity estimates" to CHANGELOG
* add some documentation to RocksDBRestReplicationHandler
* fix building with relative paths
* add some more doc
* add some tests for the replication api
* fix RocksDBRestReplicationHandler and add tests
* update documentation
* remove obsolete parameter
* fix error message
* Implementing logger-first-tick, logger-tick-ranges. Fixing dump `chunkSize` documentation
* fix buffer overruns in linenoise for long input lines
* don't make historian repeatedly print the same error messages that nothing can be done about
* make the implementations of the logging operator<<s not throw exceptions, so that logging does throw exceptions as an unintended side effect
* update CHANGELOG
* improve error message
* don't copy strings, but pass them by const reference
* added unique id to cluster, added access to Health
* added agents to health api
* added agents to health api
* added agents to health api
* transaction information for api
* agents listed like other servers
* missing line through merge conflict
* fixed git merge glitch
* added unique id to cluster, added access to Health
* added agents to health api
* added agents to health api
* added agents to health api
* transaction information for api
* agents listed like other servers
* missing line through merge conflict
* we must now ignore that datafiles are not sealed
this is because an unsealed datafile may have been produced by
renaming multiple journals to datafiles at server start
* acquire collection count after we have acquired the lock
* count the null byte as well
* fix count value acquisition
* send query fragments to the correct servers, even after failover or when a follower drops
the problem with using the previous shard-based approach is that responsibilities for shards may change at runtime
however, an AQL query must send all requests for the query to the initially used servers.
if there is a failover while the query is executing, we must still send all following requests to the same servers, and not the newly responsible servers
otherwise we potentially would try to get data from a query from server B while the query was only
instanciated on server A.
* extend linenoise character buffer size
* dont make it throw exceptions all the time
* set INSTANCE to nullptr at a later stage
otherwise a nullptr may be accessed during shutdown