Major Description
I have a need to support first byte flush with the ESI plugin.
Currently the plugin will wait for all the ESI includes to finish and the final document to be completely processed before starting to send the data back to user.
The improvement I wish is to start sending data to user as soon as all the ESI document is completely parsed and all ESI include requests are sent. The flushing will stop when the first ESI include is encountered in the document. Once the request for the include is done, the flushing will resume till the next ESI include is encountered.
I already have a patch ready and will post it here shortly. Please help to review.