http_async_client: add curl_follow_redirect parameter

[gled-rs]

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally
• Related to issue #XXXX (replace XXXX with an open issue number)

Description

add curl_follow_redirect module parameter to http_async_client to set CURLOPT_FOLLOWLOCATION during libcurl init, allowing libcurl to follow 3xx HTTP redirect responses.

[grumvalski]

Thank you! PR looks fine, documetation included. I was thinking that it would be nice to specify the parameter per query like it's done for other parameters. Could be done in this pull request or we can do it after.

[grumvalski]

I've started working on the per query implementation. Merging this for now, before the code freeze. Thanks again!