Added undefined behavior sanitizer.

Combined common sanitizer flags.
Added fuzzers.

fuzzing/fuzzing_throttle.cc

@@ -0,0 +1,33 @@
+
+#include <thread>
+
+#include "fuzzing.h"
+
+
+static unsigned int counter = 0;
+
+
+void
+fuzzing_tick(void)
+{
+	counter++;
+}
+
+
+void
+fuzzing_throttle(void)
+{
+	unsigned int delay;
+
+
+	// Give queues time to drain (avoid OOM or crash)
+	// - Too high a delay slows down fuzzing
+	// - Too low a delay causes intermittent crash on exit
+	delay = 50 + (counter / 50);
+	counter = 0;
+
+	if(delay > 5000)
+		delay = 5000;
+
+	std::this_thread::sleep_for (std::chrono::milliseconds(delay));
+}