hg: jdk/sandbox: 8146298: (dc spec) connect and disconnect methods should specify that they may block

[chris.hegarty at oracle.com]

Changeset: de56632f796d
Author:    bpb
Date:      2019-11-14 09:06 -0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/de56632f796d

8146298: (dc spec) connect and disconnect methods should specify that they may block
Reviewed-by: alanb, chegar, dfuchs, darcy

! src/java.base/share/classes/java/nio/channels/DatagramChannel.java