Collect the user IP from X-Forwarded-For, then falls back to X-Real-Ip

[bxsx]

Description of the change

The user IP will be taken from the X-Forwarded-For before checking X-Real-Ip to receive more accurate information if available.
Also, the current state of the sequence for checking the IP is not consistent across all supported frameworks.

This PR solves both issues.

I'm marking it as a breaking change as the final user IP in a payload may be different in some cases. However, this change shouldn't affect user code, and in most cases shouldn't be even noticeable.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[waltjones]

👍

[bxsx]

There were 2 issues with building the PR.

• Unnecessary launching the build at CircleCI (that is not configured and not used)
• Temporary problem with GitHub CI downloading six package. Relaunching jobs has helped.

Ready to merge now.