Un-break compilation on *BSD

Un-break compilation on *BSD

Commit 2191c47165 introduced code to handle IP address query on
multihoming hosts for IP_PKTINFO-supporting OSes, but all the BSDs
need the "#elsif IP_RECVDSTADDR" variant... add code equivalent
to what we have in socket.c/print_link_socket_actual_ex()

Tested on FreeBSD 9.3/sparc64

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <1448740717-60914-1-git-send-email-gert@greenie.muc.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/10648