RFR(XS): 8202181: Correctly specify size of hostname buffer in Unix Inet*AddressImpl_getLocalHostName implementations

[Langer, Christoph]

Hi,

please help reviewing a small change that I stumbled over when looking into the getLocalHostName implementation. I found that the length of the hostname buffer is not correctly passed to sub functions. The buffer size is specified as "NI_MAXHOST + 1", so this size should be handed down to gethostname() and getnameinfo() calls, not just NI_MAXHOST. I also moved the solaris #ifdefs into the else clause to spare a few lines of code.

Bug: https://bugs.openjdk.java.net/browse/JDK-8202181
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8202181.0/

Thanks
Christoph

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