feat: add support for configuring TLS verification policy

[torrefatto]

Hi! Thanks for this very nice piece of software. First of all, I would like to compliment you for the high quality python code in this repo. It is refreshing to read it.

I am opening this PR to add support for explicit configuration of the ssl_cert_reqs parameter, in case the connection schema is rediss. I took the liberty to also update the README with an updated iredis --help.

To pass values to the underlying SSLConnection object, the user has now two choices:

• specify the value of ssl_cert_reqs as a query parameter in the url specified via --url
• specify such value using the --verify-ssl option

Both check that the value be among none, optional or required, and the former takes precedence over the latter (same behavior as the db parameter).

This should tackle issue 403.

[laixintao]

Thanks, it's a very nice PR!

I made some (picky) suggestions, let me know what do you think.

[laixintao]

You can also leave some notes and your name in https://github.com/laixintao/iredis/blob/master/CHANGELOG.md 🔮

[torrefatto]

Thanks for the suggestions! I incorporated them in the PR (and validated them with a local test instance 😉).

I also updated CHANGELOG.md.

[laixintao]

thanks 🍰

[introom]

Hi @laixintao , looks like in versin 1.12.1, the --verify-ssl parameter is not supported , even though the document claims so.

[laixintao]

Hi @introom

I checked the code, it's supported.

iredis/iredis/client.py

Line 161 in 2c1bd35

connection_kwargs["ssl_cert_reqs"] = verify_ssl

Can you provide a testcase that --verify-ssl didn't work? thanks

[introom]

Hi @introom

I checked the code, it's supported.

iredis/iredis/client.py

Line 161 in 2c1bd35

connection_kwargs["ssl_cert_reqs"] = verify_ssl

Can you provide a testcase that --verify-ssl didn't work? thanks

Given

	iredis --verify-ssl none --url rediss://some-path

It will return:

Usage: iredis [OPTIONS] [CMD]...
Try 'iredis --help' for help.

Error: no such option: --verify-ssl

iredis, version 1.12.1

[laixintao]

hi @introom confirmed this is a release issue, we merged but don't include it in release of 1.12.1.

I have released a new version 1.13.0, can you upgrade iredis and try again? thanks.

[introom]

hi @introom confirmed this is a release issue, we merged but don't include it in release of 1.12.1.

I have released a new version 1.13.0, can you upgrade iredis and try again? thanks.

I am on homebrew not pip, so gonna be some delay