feat(stdlib): Add ingress_upstreaminfo log format to parse_nginx_log function

[esergion]

Fixes #5

Also, what do you guys think on renaming parsed fields like they are named in Nginx docs here?

I would stick with that nginx's internal fields naming "convention", it's so close to RFCs at least.

If you are agree with this, I would make another PR to rename fields in "combined" format too

[fuchsnj]

This mostly looks good. Just a few changes requested to the type definition.

Also, please add a line to the CHANGELOG.md with a summary of these changes.

[fuchsnj]

Also, what do you guys think on renaming parsed fields like they are named in Nginx docs here?

That seems reasonable to me, although this would be a breaking change. Curious if anyone else has thoughts here. I think some field names were chosen initially to match Vector conventions (such as timestamp), but I think following those conventions will be less important in the future.

[spencergilbert]

That seems reasonable to me, although this would be a breaking change. Curious if anyone else has thoughts here. I think some field names were chosen initially to match Vector conventions (such as timestamp), but I think following those conventions will be less important in the future.

I'd agree with matching the "upstream" naming schemes 👍

[esergion]

Thanks for the review, pushed all the requested changes