JDK 9 RFR of 8154183:

[Brian Burkhalter]

Please review at your convenience.

Issue:	https://bugs.openjdk.java.net/browse/JDK-8154183
Patch:	http://cr.openjdk.java.net/~bpb/8154183/webrev.00/

Summary:
1) Reinstate the ObjectInputStream part of the fix for https://bugs.openjdk.java.net/browse/JDK-4150728 which was inadvertently reverted in a subsequent merge.
2) Apply the same clarifications and addition of missing exception/throws tags to both variants of readFully().

Thanks,

Brian