hg: jdk/sandbox: 8230407: SocketPermission and FilePermission action list allows leading comma

[chris.hegarty at oracle.com]

Changeset: 71fef5fae9cc
Author:    igerasim
Date:      2019-10-16 14:32 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/71fef5fae9cc

8230407: SocketPermission and FilePermission action list allows leading comma
Reviewed-by: chegar
Contributed-by: Ivan Gerasimov <ivan.gerasimov at oracle.com>, Chris Hegarty <chris.hegarty at oracle.com>

! src/java.base/share/classes/java/io/FilePermission.java
! src/java.base/share/classes/java/net/SocketPermission.java
! test/jdk/java/io/FilePermission/SpecTests.java
! test/jdk/java/net/SocketPermission/Ctor.java