[FEATURE] Added Pool Bonus for Prop and PPLNS

[TheSerapher]

Prop and PPLNS will now allow a pool operator to run a pool bonus. It is based on the block reward and evenly paid as a percentage (default 0) to all miners.

PPS will pose a challenge since our block bonus is block bound (confirmations) and PPS does not care about blocks. So we can not easily bind a PPS pool bonus to a block.

Since PPS is not widely used, I think this a minor issue for now. Please test the Prop and PPLNS implementations, they worked fine on my testnet.

Fixes #1932 once merged.

[TheSerapher]

2% is the bonus based on your block reward. I will add an option to switch between block value and actual users payout.

[torchwooduk]

I thought it was like fees based on users payout not the actual block reward, paying everyone even 1% based on the block reward would be very expensive.

[TheSerapher]

@torchwooduk Please test it again. Default bonus method is now payout (percentage based on the users payout). It can be changed to block for a per-block value based bonus.

[TheSerapher]

Ran it on my testnet with two payouts and it worked great - if someone else can confirm too that would be appreciated.

It allows running bonus based on payouts (the default) or you can switch to block, which will base your percentage on the block value.

PPS is not supported since Bonus payments requires a block to payout properly. We can look into this later but seeing there are only very few PPS pools out there, I'd probably just skip this.

[torchwooduk]

Been running it since yesterday, works fine, Thx