Add --no-dhcpv4-interface and --no-dhcpv6-interface options.

src/dhcp.c

@@ -297,7 +297,7 @@ void dhcp_packet(time_t now, int pxe_fd)
 	}
       
       for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
-	if (tmp->name && wildcard_match(tmp->name, ifr.ifr_name))
+	if (tmp->name && (tmp->flags & INAME_4) && wildcard_match(tmp->name, ifr.ifr_name))
 	  return;
       
       /* unlinked contexts/relays are marked by context->current == context */