• lib: Allow PING frame to be sent after GOAWAY (GH-1103)
• nghttpx: Fix bug that h1 backend idle timeout expires sooner
• nghttpx: Stop overwrite of first header on mruby call to env.req.set_header(..) (Patch from Dylan Plecki) (GH-1119)
• nghttpx: Add upgrade-scheme parameter to backend option (GH-1099)
• nghttpx: Fix missing ALPN validation (--npn-list) (GH-1094)
• nghttpx: Remember which resource is pushed for RFC 8297 (GH-1101)