Announcing Support for HTTP/2 Server Push

This post announces the general availability of HTTP/2 Server Push for all Cloudflare customers. It explains the mechanism of Server Push using `PUSH_PROMISE` and `RST_STREAM` frames, and how to enable it via `Link` headers with `rel=preload`. It also details how to disable it with `nopush` and discusses best use cases and profiling methods in various browsers. The post highlights that Server Push is most effective for uncacheable content, all assets on a requested page (if not client-cached), and predicting the next likely page.