Add quic-free binaries in build pipeline

Updates #51

config_quic.go

@@ -0,0 +1,40 @@
+//go:build !qf
+
+package ctrld
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+
+	"github.com/quic-go/quic-go"
+	"github.com/quic-go/quic-go/http3"
+)
+
+func (uc *UpstreamConfig) setupDOH3Transport() {
+	rt := &http3.RoundTripper{}
+	rt.Dial = func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) {
+		host := addr
+		ProxyLog.Debug().Msgf("debug dial context D0H3 %s - %s", addr, bootstrapDNS)
+		// if we have a bootstrap ip set, use it to avoid DNS lookup
+		if uc.BootstrapIP != "" {
+			if _, port, _ := net.SplitHostPort(addr); port != "" {
+				addr = net.JoinHostPort(uc.BootstrapIP, port)
+			}
+			ProxyLog.Debug().Msgf("sending doh3 request to: %s", addr)
+		}
+		remoteAddr, err := net.ResolveUDPAddr("udp", addr)
+		if err != nil {
+			return nil, err
+		}
+
+		udpConn, err := net.ListenUDP("udp", nil)
+		if err != nil {
+			return nil, err
+		}
+		return quic.DialEarlyContext(ctx, udpConn, remoteAddr, host, tlsCfg, cfg)
+	}
+
+	uc.http3RoundTripper = rt
+	uc.pingUpstream()
+}