Documentation: Portability "rescan OR..."

[BTCBellyButton]

I recently moved JM from a machine to a new one so I read the doc here:

https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/USAGE.md#portability

The second paragraph makes you think that in that case (new machine/new BTC instance), the only way to complete an import of your old jm wallet in the new machine is to do a rescan after moving the .jmdat file to the new setup.

I tried to just copy the old .bitcoin/jmwallet directory (or whatever name was picked) to the new machine and it worked. Unless there are reasons not to do it that way, maybe the doc should read something like:

".... .jmdat file to the new setup. Since the new Bitcoin Core instance doesn't have the addresses imported, you will need to do a rescan of the blockchain for some appropriate range of blocks OR to copy the directory of the join market wallet from the old .bitcoin/ directory to the new one."

It may be helpful, I guess.