on the network inter communication add a version number

[Hardcore-fs]

in the chia network allow clients to be able to distinguish the version number of the software.
There is a lot of "old" clients attempting double spend floods.
there have been multiple occasions where external clients are either blocking connections or causing multiple "py" errors to be thrown.
2021-05-22T11:19:17.211 full_node full_node_server : ERROR Exception: <class 'concurrent.futures._base.CancelledError'>, closing connection {'host': '3.112.39.93', 'port': 8444}. Traceback (most recent call last): File "/home/chia/chia-blockchain/chia/server/server.py", line 536, in api_call response: Optional[Message] = await asyncio.wait_for(wrapped_coroutine(), timeout=timeout) File "/usr/local/lib/python3.7/asyncio/tasks.py", line 435, in wait_for await waiter concurrent.futures._base.CancelledError

2021-05-22T15:13:15.723 full_node full_node_server : ERROR Exception: <class 'concurrent.futures._base.CancelledError'>, closing connection {'host': '117.30.166.80', 'port': 8444}. Traceback (most recent call last): File "/home/chia/chia-blockchain/chia/server/server.py", line 536, in api_call response: Optional[Message] = await asyncio.wait_for(wrapped_coroutine(), timeout=timeout) File "/usr/local/lib/python3.7/asyncio/tasks.py", line 435, in wait_for await waiter concurrent.futures._base.CancelledError