* ignore some return codes when closing zip files and do not report them
* hide mostly useless debug message
* clear basic authentication cache after deletion of users and after updating them
otherwise deleted/changed users can still access the database!
* adjust wording
* added notes about mmfiles-specific parameters
* updated CHANGELOG and documentation
* add warmup documentation - #188
* warn when relinking build directory
* add warmup documentation - #188
* warn when relinking build directory
* Renamed warmup to loadIndexesInMemory which is a better name for the current implementation of this feature.
* Adapted WebUI to state 'load indexes in memory' instead of 'warmup'
* Added loadIndexesInMemory documentation.
* Renamed loadIndexesInMemory => loadIndexesIntoMemory
added more memory diagnostics for memory usage:
- collection.figures() now returns a "readCache" attribute which contains the
number of and memory usage of entries in the document revisions cache for the
collection, and a "revisions" attribute with the number and memory usage
of entries in the storage engine's revision lookup table for the collection
- the default value for --database.revision-cache-target-size was changed from
75% of RAM to 30% of RAM