sun.awt.AppletSecurity::currentAppletClassLoader hacks into private fields in URLClassLoader::acc and AccessControlContext::context. This fix needs to be re-examined as it will not work with the upcoming change of the module system

Also, (according to the comments in InetAddress.java) deploy code uses reflection to gain access to InetAddress.getByName(String,InetAddress). We should add an accessor to the existing JavaNetInetAddressAccess class returned by SharedSecrets.