http2/http2-spec — pull request #453 by jpinner (2014-04-12 07:35:03+00:00)
Title: Simplify stream priority.

The priority groups are abandoned in favor of a single weighted priority tree.
The root node of the tree is the connection, assigned the stream identifier 0x0.
By default, streams are assigned a stream dependency of 0x0 with a weight of 16.