Add URL query param support for verify_ssl

[florinutz]

Summary of the changes / Why this is an improvement

Adds support for ?verify_ssl=<bool> in the host URL passed to --hosts.

The cli flag --verify-ssl continues to take precedence over the URL param.

Checklist

• Link to issue this PR refers to (if applicable): Fixes Respect URL connectivity parameters  #482

[amotl]

Thank you for the excellent contribution. Lgtm, but let me also add @mfussenegger for an additional review.

[mfussenegger]

I hadn't seen #482
Can you elaborate on the motivation for this - why would we need both, --verify-ssl and a URL query arg?

[florinutz]

we don't need both. @amotl wdyt?

[amotl]

Hi. I think it is more important for drivers, where you can't define any special flags. However, it is also convenient to be able to use the same style across environments, possibly making the handling easier for scripting purposes. I think GH-482 was written down after a conversation with @WalBeh coming from such spirits. Maybe he can drop a few words about his ambitions?

[mfussenegger]

However, it is also convenient to be able to use the same style across environments, possibly making the handling easier for scripting purposes.

Not sure why - using a driver API and invoking the crash CLI is pretty different.
A few of the CI jobs for CrateDB actually do use a --verify-ssl False and use an URL that includes ?verify_ssl=False because they use both crash and cr8 and there are no issues with that.

Imho the PR isn't needed - more downsides to it due to the additional complexity, both in code but also from a UI perspective for users.

[amotl]

Thanks. @WalBeh: Could you elaborate why this was on your wishlist? Maybe it was a misunderstanding: In this case you can blame that on me.