Add option -in/--insecure_tls to not check certificate hostname

[mcesar-rlacruz]

Description:

New command line option -ti/--tls_insecure is added. When enabled, causes the TLS engine not to check the server hostname against the hostname contained in the certificate provided by the server. This may be needed in scenarios where we are accessing an MQTT server having a valid, CA signed, certificate from an internal network, where such server is accessed via a local name or even a local IP address (192.168.x.y, or even 127.0.0.1).

This option is ignored if TLS is not enabled.

Checklist:

• [*] I have created the pull request against the latest development branch
• [*] I have added only one feature/fix per PR and the code change compiles without warnings
• [*] I accept the Developer Certificate of Origin (DCO).

[koenvervloesem]

Thanks for this contribution! Can you run pre-commit like explained here to solve code issues: https://gateway.theengs.io/participate/development.html

[koenvervloesem]

Thanks! This just needs a run of ruff format on TheengsGateway/ble_gateway.py and an addition of the new option to the documentation (https://github.com/theengs/gateway/blob/development/docs/use/use.md#for-a-regular-installation-1), and then this looks ready to merge.