Docs, Node picks a default home folder if created with NULL as its home path, and add binary tap drivers (self-signed for now).

node/Defaults.hpp

@@ -51,6 +51,11 @@ public:
 		throw(std::runtime_error);
 	~Defaults() {}
 
+	/**
+	 * Default home path for this platform
+	 */
+	const std::string defaultHomePath;
+
 	/**
 	 * Supernodes on the ZeroTier network
 	 */