Update error message for invalid IP and port format to clarify ipv6

[hoffmang9]

Hint how to format the ipv6 address on the command line

Purpose:

It is not entirely clear what the proper method of handing an ipv6:port is on the command line. Extending this error message gives the user a solid hint on how to do it appropriately. Also updated the v4 example to hint the correct port of 8444 since that's what most nodes are on.

Current Behavior:

Everything works as expected, but it's hard to find documentation re ipv6

New Behavior:

Error message explains both ipv4 and ipv6

Testing Notes:

Manually tested that the ipv6 address is being correctly parsed by urlsplit(). The example v6 address is currently node.chia.net. Also manually confirmed that my ipv6 farm could add my other ipv6 farm in [ipv6]:8444 form.

[github-actions]

File	Coverage	Missing Lines
chia/cmds/peer_funcs.py	0.0%	lines 23

Total	Missing	Coverage
Unknown	Unknown	0%

[coveralls-official]

Pull Request Test Coverage Report for Build 18606105192

Details

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 38 unchanged lines in 7 files lost coverage.
• Overall coverage decreased (-0.02%) to 90.828%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
chia/cmds/peer_funcs.py	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
chia/full_node/full_node_api.py	1	85.95%
chia/_tests/simulation/test_simulation.py	1	96.47%
chia/_tests/core/test_farmer_harvester_rpc.py	2	98.08%
chia/server/node_discovery.py	3	80.32%
chia/timelord/timelord.py	3	71.62%
chia/full_node/full_node.py	4	86.85%
chia/_tests/core/util/test_lockfile.py	24	77.31%

Totals
Change from base Build 18601081112:	-0.02%
Covered Lines:	102288
Relevant Lines:	112461

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💛 - Coveralls