5% block reward code to AVN foundation wallet

[alamshafil]

5% block reward code to AVN foundation wallet

[alamshafil]

Important to have #71 to scan code. Rebasing against updated 4.1 branch.

[alamshafil]

Since this PR deals with a consensus change, I believe having #72 is important to check that nothing broke or regressed with this PR.

[alamshafil]

Working as expected on regtest.

FounderPayment::FillFounderPayment -- Founder payment 3125000000 to n1BurnXXXXXXXXXXXXXXXXXXXXXXU1qejP

   {
      "value": 31.25000000,
      "n": 1,
      "scriptPubKey": {
        "asm": "OP_DUP OP_HASH160 d7c8944771bbfe427418f27320e72a1322faf134 OP_EQUALVERIFY OP_CHECKSIG",
        "hex": "76a914d7c8944771bbfe427418f27320e72a1322faf13488ac",
        "reqSigs": 1,
        "type": "pubkeyhash",
        "addresses": [
          "n1BurnXXXXXXXXXXXXXXXXXXXXXXU1qejP"
        ]
      }
    }