1. Fix memory leak in the transaction pool - thanks to external contributor @dmitry123 for bringing attention to it
2. Memory leak fix in transaction pool also fixes failure in txpool_content RPC method, now it works well even for the large pool sizes.
3. Fixed the output format of erigon_issuance RPC method.
4. Asynchronous transaction broadcast in transaction pool to fix slow pending transaction feed for eth_subscribe
5. Penalise peers for more cases of invalid RLPs
6. Compatibility fix for eth_getTransactionByBlockHashAndIndex for the cases where transaction index is higher or equal than number of transactions in the block.
7. Updates to pre-verified hashes for Ropsten and Mainnet, change of skip analysis optimisation parameter