Aftermath of ea2d851a.
http_upload from xep_0363 is now forwarding all its extra input args
to get_info_from_domain. Sadly for us, get_info_from_domain won't
accept any extra args passed that way and will instead yield a "got an
unexpected keyword argument" exception on runtime.
Modifying get_info_from_domain to accept these extra args.
I hit this bug by passing a timeout_callback argument to http_upload.
Adding this scenario to the relevant integration test.
Note: I hit this bug in a NixOS test. This patch does fix my bug, I however did not manage to run the integration test, I hope I did not screw up there :o)