tox private impl + dht caps histo

src/tox_dht_cap_histo.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <solanaceae/toxcore/tox_private_interface.hpp>
+
+#include <vector>
+
+class ToxDHTCapHisto {
+	ToxPrivateI& _tpi;
+
+	bool _enabled {true};
+	bool _show_window {false};
+
+	std::vector<float> _ratios;
+	const float _value_add_interval {1.f}; // every second
+	float _time_since_last_add {0.f};
+
+	public:
+		ToxDHTCapHisto(ToxPrivateI& tpi) : _tpi(tpi) {}
+
+		void tick(float time_delta);
+		void render(void);
+};