Proxy forging recipient no longer needs a public key on the blockchain
at the point PROXY_FORGING transaction is submitted.
Proxy forging recipient is given a last-reference, if they don't have one,
when they receive their first block rewards.
Split block fees in proxy forging scenario, using same share proportion.
100% proxy sharing is now allowed.
Fixed account flags processing for accounts in genesis block.
7a318c9fc7