RFR: 8279283 - BufferedInputStream should override transferTo [v8]

[Markus KARG]

> Implementation of JDK-8279283

Markus KARG has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains ten commits:

 - proposal by Alan Bateman
 - modified locking
 - HexPrinter::transferTo
 - using getBufIfOpen() instead of direct buf access
 - fixed missing BufferedInputStream
 - removed unused code
 - test for BufferedInputStream.transferTo
 - synchronized BufferedInputStream::transferTo
 - BufferedInputStream::transferTo

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Changes: https://git.openjdk.org/jdk/pull/6935/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=6935&range=07
  Stats: 240 lines in 3 files changed: 240 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/6935.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/6935/head:pull/6935

PR: https://git.openjdk.org/jdk/pull/6935