RFR: 8278312: Update SimpleSSLContext keystore to use SANs for localhost IP addresses

[Michael McMahon]

This updates the testkeys keystore file used by SimpleSSLContext in the test tree, in order to add subject alt names for the literal IP addresses "127.0.0.1" and "::1". This should allow the self signed certificate in the keystore to be accepted even when the local OS doesn't have a localhost to loopback address name service mapping.

Apart from the test, there's nothing to see in the webrev as it's a binary file. Here is the relevant diff between the list output from the old and new keystores

24c24,31
< #1: ObjectId: 2.5.29.14 Criticality=false
---
> #1: ObjectId: 2.5.29.17 Criticality=true
> SubjectAlternativeName [
>   DNSName: localhost
>   IPAddress: 127.0.0.1
>   IPAddress: 0:0:0:0:0:0:0:1
> ]
>

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

Commit messages:
 - updated to check for IPv4/IPv6 support
 - updated to use HttpServerAdapters and h2 tests
 - Merge branch 'master' into simplesslcontext
 - initial fix

Changes: https://git.openjdk.java.net/jdk/pull/6727/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6727&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278312
  Stats: 222 lines in 3 files changed: 218 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6727.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6727/head:pull/6727

PR: https://git.openjdk.java.net/jdk/pull/6727