In case anyone installs named on a production system:
the Makefile for named-xfer doesn't set BINDIR.  named-xfer
therefore gets installed in /usr/sbin, but named tries
to invoke it as  /usr/libexec/named-xfer.  This will cause
zone transfers to fail, or to be done with an old named-xfer.

A simple fix is to change src/usr.sbin/named/named-xfer/Makefile
to set

BINDIR=		/usr/libexec