High avaliability config default change:
Change default value for retry_reads_on_primary config option to true as this guards against unexpected replication delays
Remove unexpected differences for XF2.2 and XF2.3 support (only tested on XF2.2)
When displaying redis version, include the redis varaint type.
Known variants are keydb & dragonflydb.
Dragonflydb does not appear to support IO stats at the moment