Bug#722075: libc6: getaddrinfo() sends DNS queries to random file descriptors

[Arnaud Le Blanc <arnaud.lb@gmail.com>]

More informations on the bug:

I previously reported it here:
http://code.google.com/p/go/issues/detail?id=6336#c9 . At least 3
others have successfully reproduced the bug using the provided C code
on Debian, Archlinux (and maybe other unspecified distros).

I've failed reproducing it on some fedora VMs (Fedora 16 and 19),
although it may be due to other factors.

I've looked more closely at the garbage received on the socket, and
it's always a full, well-formed, DNS query. It seems to always be an
AAAA query, even when hints.ai_family is AF_INET. All requests are
similar, only the id changes.