RFR: JDK-8319382: com/sun/jdi/JdwpAllowTest.java shows failures on AIX if prefixLen of mask is larger than 32 in IPv6 case

[Joachim Kern]

In parseAllowedMask in socketTransport.c, prefixLen of mask is compared with a maxValue (32 for IPv4, 128 otherwise).  This fails if it is larger than 32, because getaddrinfo seems to detect IPv4 family, if IPv6 address has set only some of the last 32 Bits. So we take the wrong maxValue.

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

Commit messages:
 - JDK-8319382

Changes: https://git.openjdk.org/jdk/pull/17374/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17374&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319382
  Stats: 30 lines in 1 file changed: 2 ins; 19 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/17374.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17374/head:pull/17374

PR: https://git.openjdk.org/jdk/pull/17374