[9] RFR JDK-8068373: (prefs) FileSystemPreferences writes \0 to XML storage, causing loss of all preferences

[Brian Burkhalter]

Hello,

Based on previous discussions this thread which used to be an RFC is now an RFR. Thanks to Paul and Roger for comments.

Issue:	https://bugs.openjdk.java.net/browse/JDK-8068373
Patch:	http://cr.openjdk.java.net/~bpb/8068373/webrev.04/

Historical variants may be seen here: http://cr.openjdk.java.net/~bpb/8068373/

One problem (or not) with this approach is that old FileSystemPreferences caches which already contain U+0000 will still cause a failure on reading in Java 9+ but perhaps we do not care.

Thanks,

Brian