Yes, if decision is to not merge this, I will just create wrapper scripts for `importmulti` that will allow partial rescan for importing single privkey or address.
> If this is accepted, clients can import multiple addresses by calling import* multiple times, which would incur in unnecessary rescans.
It is already possible with full rescans. This PR just adds option to do partial rescan instead.
> Should have tests.
Will look at tests if this is accepted.