Additional documentation to clarify `replicate` options

[sam / song]

There are a couple of interesting looking options for replicate that aren't documented at https://developer.redis.com/riot/

• --event-order
• --flush-interval
• --skip-policy

Some questions I was hoping the documentation would be able to answer

• --event-order=FIFO is self-explanatory, but it's unclear what the default (PRIORITY) actually means
• When should users consider using a different --flush-interval? It's unclear what this actually controls.
• --skip-policy=LIMIT is the default; how does this different from the other options (e.g. ALWAYS, LIMIT)?

[Julien Ruaux]

Thanks for spotting this. Added to the 3.1.1 release documentation