Add --globoff option to shell_curl

[adamrdavid]

In some common api specifications there exist nested query parameters that take the form of an object.
Example: page[limit]=10 https://jsonapi.org/

This PR

1. Adds a fixture for nested query params and associated test cases
2. Adds the --globoff or -g option for the curl command to allow unescaped brackets in the url

[CLAassistant]

All committers have signed the CLA.

[reynolek]

With a recent change, we are converting over to using const and let rather than var. There is likely also a merge conflict with this exact issue as well. Would you mind sweeping through your new code and eliminating var, and then I can get this merged.

[reynolek]

Thanks for knocking that out! Merging now.