Rich, complex rules for advanced load balancing

What this post added

Introduced a custom rule builder for Cloudflare Load Balancing, built on the open-source wirefilter execution engine. This allows users to define complex traffic steering logic using 'and'/'or' statements based on various request attributes (path, headers, query strings, cookies, IP source addresses) for both DNS and proxied load balancing. This enables advanced use cases such as segmenting high-volume e-commerce transactions based on query string values and implementing split-horizon DNS by routing based on IP source address.