[Bug libc/9981] New: getaddrinfo prefers listening on ipv4-only over ipv4+ipv6

["aurelien at aurel32 dot net" <sourceware-bugzilla at sourceware dot org>]

The current getaddrinfo code prefers listening on ipv4-only instead of 
ipv4+ipv6 as previously. The gaitest.c file demonstrates the problem.

On a machine with both ipv4 and ipv6 connectivity, it returns:
        * ipv4 (only)
        * ipv6+ipv4

Listening for ipv6 connections never hurts, even if no one will ever
reach the server via ipv6.

-- 
           Summary: getaddrinfo prefers listening on ipv4-only over
                    ipv4+ipv6
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: aurelien at aurel32 dot net
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=9981

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