pkg/kamailio/deb: add http_async to kamailio-extra-modules [skip ci]

[btriller]

(cherry picked from commit 72daa18)

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

[miconda]

The name of the module is http_async_client, the modules group is named http_async. These need to be reflected properly -- in some parts of the changes, there are module names, not module group names.

[btriller]

in some parts of the changes, there are module names, not module group names.

@miconda Are you referring to the descriptions in the control files? I'd then submit another pull request to master and backport that to active branches, if you agree.

[linuxmaniac]

I did the necessary cherry-picks manually. Thanks for your contribution.