Added isPrefixEqual, fixed unit test bug, fixed ipv6 bind bug

zto/node/InetAddress.hpp

@@ -347,6 +347,16 @@ struct InetAddress : public sockaddr_storage
 	 */
 	InetAddress network() const;
 
+#ifdef ZT_SDK	
+    /**
+	 * Test whether this IPv6 prefix matches the prefix of a given IPv6 address
+	 *
+	 * @param addr Address to check
+	 * @return True if this IPv6 prefix matches the prefix of a given IPv6 address
+	 */
+	 bool isEqualPrefix(const InetAddress &addr) const;
+#endif
+
 	/**
 	 * Test whether this IP/netmask contains this address
 	 *