Feature request: Pay out rewards to separate address

[Phistr90]

Hi,

Due to taxation issues/situations in some jurisdiction it would be very helpful if you could have the option to pay out the staking rewards to a separate address instead of always automatically re-staking them.

[evgenykuzyakov]

This is technically complicated, because we can't automatically unstake the rewards for a given account. But if the account pings the contract, then we can unstake the extra balance from this account.

In theory we can implement a staking pool contract that keeps the rewards fixed without restaking them and rebalanaces it when it's pinged. But it's an extra logic that is not trivial.