config: default to use_ssl=True, port=6697

[half-duplex]

Description

Replace the defaults use_ssl=False; port=6667 with use_ssl=True; port=6697 and update associated docs.

I replaced ini e.g. use_ssl=on with use_ssl=true to match what the sopel configurator produces.

It would be neat to check the connection/cert and handhold a bit through that setup, but that's... less trivial

⚠️ This is a breaking change for users who rely on the defaults in their config files.
The configurator (at least the one in master) does write those lines even if they're left default, so this is probably not all too many users.

Checklist

• I have read CONTRIBUTING.md
• I can and do license this contribution under the EFLv2
• No issues are reported by make qa (runs make quality and make test)
  Well... No unexpected errors. We still have py3.10 issues =|
• I have tested the functionality of the things this change touches

[dgw]

I can feel the sanity building up.