// strccmp(): case-insensitive strcmp()
int strccmp (const char * s1, const char * s2)
{
	char c1;
	char c2;
	int diff;

	do
	{
		c1 = tolower (*s1++);
		c2 = tolower (*s2++);
		diff = c1 - c2;
	}
	while (diff == 0 && c1 != '\0' && c2 != '\0');

	return diff;
}