lncli: add querymc command

Adds querymc command to lncli to dump mission control state.

cmd/lncli/routerrpc_active.go

@@ -0,0 +1,10 @@
+// +build routerrpc
+
+package main
+
+import "github.com/urfave/cli"
+
+// routerCommands will return nil for non-routerrpc builds.
+func routerCommands() []cli.Command {
+	return []cli.Command{queryMissionControlCommand}
+}