Missing part of EIP-3675: Network related area

[jangko]

See network section of EIP-3675

Network

EIP-2124 fork identifier

For the purposes of the EIP-2124 fork identifier, nodes implementing this EIP MUST set the FORK_NEXT parameter to the FORK_NEXT_VALUE.

devp2p

The networking stack SHOULD NOT send the following messages if they advertise the descendant of any terminal PoW block:

• NewBlockHashes (0x01)
• NewBlock (0x07)

Beginning with receiving the FIRST_FINALIZED_BLOCK, the networking stack MUST discard the following ingress messages:

• NewBlockHashes (0x01)
• NewBlock (0x07)

Beginning with receiving the finalized block next to the FIRST_FINALIZED_BLOCK, the networking stack MUST remove the handlers corresponding to the following messages:

• NewBlockHashes (0x01)
• NewBlock (0x07)

Peers that keep sending these messages after the handlers have been removed SHOULD be disconnected.

Note: The logic of message handlers that are not affected by this section MUST remain unchanged.