#define char_lower(c)  ((c >= 'A' && c <= 'Z') ? c|32 : c)

#if 0				/* string.h , libc */
int
strcasestr(str, tag)
    char           *str, *tag;	/* tag : lower-case string */
{
    char            buf[256];

    str_lower(buf, str);
    return (int)strstr(buf, tag);
}
#endif

int
bad_subject(char *subject)
{
    char           *badkey[] = {"µL½X", "avcd", "mp3", NULL};
    int             i;
    for (i = 0; badkey[i]; i++)
	if (strcasestr(subject, badkey[i]))
	    return 1;
    return 0;
}
