RFR: 8153005: Upgrade the default PKCS12 encryption/MAC algorithms [v3]

[Weijun Wang]

> Default algorithms are bumped to be based on PBES2 with AES-256 and SHA-256. Please also review the CSR at
> https://bugs.openjdk.java.net/browse/JDK-8228481.

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  update README and exclude README

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/473/files
  - new: https://git.openjdk.java.net/jdk/pull/473/files/6b5c5b5e..41be78aa

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=473&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=473&range=01-02

  Stats: 39 lines in 2 files changed: 7 ins; 6 del; 26 mod
  Patch: https://git.openjdk.java.net/jdk/pull/473.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/473/head:pull/473

PR: https://git.openjdk.java.net/jdk/pull/473