Make freebsd not use POSIX 2008 locales

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265950

We do not yet know the extent of the problem.

Author: khwilliamson

hints/freebsd.sh

@@ -371,3 +371,6 @@ esac
 # This function on this box has weird behavior.  See
 # https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255646
 d_querylocale='undef'
+
+# See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265950
+d_duplocale='undef'