diff -up man-pages-3.45/man5/resolv.conf.5.orig man-pages-3.45/man5/resolv.conf.5
--- man-pages-3.45/man5/resolv.conf.5.orig	2012-12-20 18:17:28.000000000 +0100
+++ man-pages-3.45/man5/resolv.conf.5	2012-12-21 15:27:18.542544649 +0100
@@ -245,6 +245,13 @@ cannot handle these queries properly and
 This option disables the behavior and makes glibc perform the IPv6
 and IPv4 requests sequentially (at the cost of some slowdown of the
 resolving process).
+.TP
+.BR single-request-reopen " (since glibc 2.9)"
+The resolver uses the same socket for the A and AAAA requests.  Some hardware
+mistakenly only sends back one reply.  When that happens the client sytem will
+sit and wait for the second reply.  Turning this option on changes this behavior
+so that if two requests from the same port are not handled correctly it will
+close the  socket and open a new one before sending the second request.
 .RE
 .LP
 The \fIdomain\fP and \fIsearch\fP keywords are mutually exclusive.