RFR: 8373676: Test javax/net/ssl/HttpsURLConnection/SubjectAltNameIP.java fails on a machine without IPV6

[Matthias Baesken]

We have a Linux machine with IPV6 disabled.
There the test javax/net/ssl/HttpsURLConnection/SubjectAltNameIP.java fails.
Error is

java.lang.RuntimeException: Server failed to start.
at SubjectAltNameIP.doClientSide(SubjectAltNameIP.java:139)
at SubjectAltNameIP.<init>(SubjectAltNameIP.java:189)
at SubjectAltNameIP.main(SubjectAltNameIP.java:176)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1516)
Caused by: java.net.SocketException: Protocol family unavailable


After looking into the test, it turned out the IPV6 address `::1`  was passed in the notion `[::1] `to the isIPv6LiteralAddress, but this method must get the address without '[' and ']' .
Additionally I adjusted the exception a bit so that it directly mentions IPV6 and not just some 'protol family' .

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Commit messages:
 - JDK-8373676

Changes: https://git.openjdk.org/jdk/pull/28825/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28825&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373676
  Stats: 16 lines in 2 files changed: 11 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/28825.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28825/head:pull/28825

PR: https://git.openjdk.org/jdk/pull/28825