if (e.code() == boost::system::errc::address_in_use) {
cerr << argv[0] << ": address already in use. Is another DCP-o-matic server instance already running?\n";
exit (EXIT_FAILURE);
if (e.code() == boost::system::errc::address_in_use) {
cerr << argv[0] << ": address already in use. Is another DCP-o-matic server instance already running?\n";
exit (EXIT_FAILURE);