Add hysteria and acme TLS certificate issuer (#18)

* Add hysteria client/server
* Add acme TLS certificate issuer

outbound/hysteria_stub.go

@@ -0,0 +1,16 @@
+//go:build !with_quic
+
+package outbound
+
+import (
+	"context"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func NewHysteria(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.HysteriaOutboundOptions) (adapter.Outbound, error) {
+	return nil, E.New(`QUIC is not included in this build, rebuild with -tags with_quic`)
+}