Add an xC relay protocol analyzer

xR/Makefile

@@ -0,0 +1,17 @@
+.POSIX:
+AWK = env LC_ALL=C awk
+
+tools = ../liberty/tools
+generated = proto.go
+outputs = xR $(generated)
+all: $(outputs)
+generate: $(generated)
+
+proto.go: $(tools)/lxdrgen.awk $(tools)/lxdrgen-go.awk ../xC.lxdr
+	$(AWK) -f $(tools)/lxdrgen.awk -f $(tools)/lxdrgen-go.awk \
+		-v PrefixCamel=Relay ../xC.lxdr > $@
+xR: xR.go ../xK-version $(generated)
+	go build -ldflags "-X 'main.projectVersion=$$(cat ../xK-version)'" -o $@ \
+		-gcflags=all="-N -l"
+clean:
+	rm -f $(outputs)