hg: jdk/sandbox: Merge

[michael.x.mcmahon at oracle.com]

Changeset: e35cecd78576
Author:    michaelm
Date:      2020-01-13 12:17 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/e35cecd78576

Merge

- src/hotspot/share/runtime/flags/jvmFlagWriteableList.cpp
- src/hotspot/share/runtime/flags/jvmFlagWriteableList.hpp
! src/java.base/share/classes/java/nio/channels/spi/SelectorProvider.java
! src/java.base/share/classes/sun/nio/ch/SelectorProviderImpl.java
- test/jdk/jdk/jfr/api/consumer/recordingstream/TestSetFlushInterval.java
- test/jdk/jdk/jfr/api/recording/time/TestSetFlushInterval.java