Re: Add http connection service file functionality

Hello,

I went ahead and repurposed this patch to implement connection
parameter lookup similar to how it is currently done for LDAP. This
means this will only look up the info for a single service and is only
accessible via the pg_service.conf file. I also tested builds for with
and without oauth configured and it builds so I think the CI issues
should be fixed now. I also expanded unit tests significantly.

Also I forgot to mention in my last emails that the implementation for
the libcurl logic was mostly borrowed from the libcurl docs[0].

Thanks,
Andrew Jackson

[0]: https://curl.se/libcurl/c/fopen.html