28 Upgrade notes for 6.0.18

Proxy history housekeeping

The limitation on the amount of outdated information deleted from the proxy database per proxy history housekeeping cycle has been removed.

Previously the housekeeper deleted only no more than 4 times the HousekeepingFrequency hours of outdated information. For example, if HousekeepingFrequency was set to "1", no more than 4 hours of outdated information (starting from the oldest entry) was deleted. In cases when a proxy would constantly receive data older than set in ProxyOfflineBuffer, this could result in excessive data accumulation.

Now this limitation has been removed, providing a more effective proxy history housekeeping solution.