RFR: 8260520: Avoid getting permissions in JarFileFactory when no SecurityManager installed [v2]

[Claes Redestad]

> 8260520: Avoid getting permissions in JarFileFactory when no SecurityManager installed

Claes Redestad has updated the pull request incrementally with two additional commits since the last revision:

 - Copyrights
 - Same for Windows

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2263/files
  - new: https://git.openjdk.java.net/jdk/pull/2263/files/09e4ff9e..81d3a4d0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2263&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2263&range=00-01

  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2263.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2263/head:pull/2263

PR: https://git.openjdk.java.net/jdk/pull/2263