add missing file

Former-commit-id: 24e85bc84f58bbfbef973eab64017a08e3f34d7d

src/keydbutils.cpp

@@ -0,0 +1,10 @@
+#include "server.h"
+
+namespace keydbutils
+{
+    template<>
+    size_t hash(const sdsview& t)
+    {
+        return (size_t)dictGenHashFunction(static_cast<const char*>(t), t.size());
+    }
+}