NetXMS 5.2 patch release 4

[victor]

We just published patch release 4 for version 5.2. Changes since previous patch release:

• System event is generated when responsible user for object added or removed
• Support for custom OUI database entries
• Fixed bug in loading NXSL "stdlib" script
• Add BOM sequence skip for structured data extractors (including web service extractor)
• Network map fixes: refresh while drag, jumping labels on links and not saved object location after 'align to grid' action
• NXSL function JsonParse sets global variables $jsonErrorMessage, $jsonErrorLine, and $jsonErrorColumn after parsing error
• NXSL function JsonParse accepts optional second argument to control interpretation of integers as floating point numbers
• Configurable data collection scheduling mode that requires connectivity before scheduling DCI for collection
• Fixed issues:
    - NX-2737 (Switch from obsolete SQLite shared cache mode to WAL mode)
    - NX-2783 (Network discovery view shows "Invalid thread access" error on web)
    - NX-2788 (Changing Objects.Nodes.SyncNamesWithDNS requires server restart, while it should not)
    - NX-2790 (Interface Overview view should have node name when interface is under a circuit)
    - NX-2795 (Selection on map is frequently lost)
    - NX-2797 (Hide passwords in server configuration variables view)
    - NX-2802 (Show units for server configuration variables)
    - NX-2806 (Data collection scheduling mode that requires connectivity before scheduling DCI for collection)
    - NX-2807 (EPP export does not escape < and > in XML attributes)