snake: stream sql mock + add republished channel option

ixsnake/ixsnake/IXStreamSql.h

@@ -0,0 +1,24 @@
+/*
+ *  IXStreamSql.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2020 Machine Zone, Inc. All rights reserved.
+ */
+
+#pragma once
+
+#include <string>
+#include "nlohmann/json.hpp"
+
+namespace snake
+{
+    class StreamSql
+    {
+    public:
+        StreamSql(const std::string& sqlFilter);
+        ~StreamSql() = default;
+
+        bool match(const nlohmann::json& pdu);
+
+    private:
+    };
+}