* 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
* Count as checksum
* Make readLockId optional as well so upgrades are possible
* fix option name in startup script
* fix some replication issues with RocksDB engine
* simplify index API a bit
* fix fulltext index removal performance, simplified code
* updated CHANGELOG
* fix hanging test
* try to fix shutdown problem
* improve fulltext query performance
* fixed duplicate var
* removed obsolete code
* fix some shutdown races
* do not call ensureIndex that often
* implement transaction handler in c++
* add fake request object
* move general code into extra file
* improve error messages for RestJobHandler
* support cancel operation for async jobs with RestTransactionHandler
* fix integration test and add some optional debugging output
* fix returning of context
* fix error type
* fix code in cluster test
* remove unused variable