Revert "feed.http-hooks" HTTP request construction to use "http_build_query()" so nested "storyData" is handled correctly
This behavior was changed by D20049. I think it's generally good that we not accept/encode nested values in a PHP-specific way, but retain feed.http-hooks compatibility for now.
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D20114