OTA environment variables documentation is poor

[lucas-mmb]

The Thingsboard documentation https://thingsboard.io/docs/user-guide/ota-updates/ states that the TB_QUEUE_CORE_FW_PACK_SIZE and TB_QUEUE_CORE_FW_PACK_INTERVAL_MS should be used to modify the number of devices that are queued for an OTA, and also how long they are queued before starting the next "pack" of updates.

The actual configuration variables from https://thingsboard.io/docs/user-guide/install/config/ seem to be TB_QUEUE_CORE_OTA_PACK_SIZE and TB_QUEUE_CORE_OTA_PACK_INTERVAL_MS.

The "packs" are also not started at the same time, the start times appear to be averaged across the start time which is not clear from the documentation at all. I expected the pack to all start at once.

With a pack size of 10, and interval of 600000ms (10 min), one device gets unqueued per minute.