gethostbyname failure doesn't throw an exception

[dukeleto]

Currently in src/io/socket_unix.c there is the following code:

        /* Maybe it is a hostname, try to lookup */
        /* XXX Check PIO option before doing a name lookup,
         * it may have been toggled off.
         */
        struct hostent *he = gethostbyname(host);
        /* XXX FIXME - Handle error condition better */
        if (!he) {
            fprintf(stderr, "gethostbyname failure [%s]\n", host);
            return;
        }

What kind of exception should be thrown here?

[nwellnhof]

I fixed that a while ago.