Top level tracking bug:

Design Specification

Blocked by Issues:

• uhv: move http-parser to envoy #19749
• uhv: http-parser: add option to skip header validation #19750
• uhv: nghttp2 patch: add option to disable header validation #19751
• uhv: define extensible validation API #19752
• uhv: implement default protocol header validations #19753
• uhv: hcm header validation policy configuration #19754
• uhv: codec honor legacy header validation configuration #19755