Add a flag for controlling SSL verification of NGINX stub_status/API endpoint

[razaj92]

Proposed changes

Adding a flag to allow connecting to insecure TLS endpoints

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• [ x ] I have read the CONTRIBUTING guide
• [ x ] I have proven my fix is effective or that my feature works
• [ x ] I have checked that all unit tests pass after adding my changes
• [ x ] I have ensured the README is up to date
• [ x ] I have rebased my branch onto master
• [ x ] I will ensure my PR is targeting the master branch and pulling from my branch on my own fork

[pleshakov]

Thanks for the PR!

Please see my comments

[pleshakov]

@razaj92 thank you!