Add a fast non-cryptographic PRNG.

node/RuntimeEnvironment.hpp

@@ -31,6 +31,7 @@
 #include <string>
 #include "Identity.hpp"
 #include "Condition.hpp"
+#include "CMWC4096.hpp"
 
 namespace ZeroTier {
 
@@ -77,6 +78,9 @@ public:
 	// signal() to prematurely interrupt main loop wait
 	Condition mainLoopWaitCondition;
 
+	// non-cryptographic fast PRNG
+	CMWC4096 prng;
+
 	Identity configAuthority;
 	Identity identity;