The util_strcasecmp function performs a comparison of two alphanumeric strings and returns a -1, 0, or 1 to signal which is larger or that they are identical.
The comparison is not case-sensitive.
int util_strcasecmp(const char *s1, const char *s2);
1 if s1 is greater than s2.
0 if s1 is equal to s2.
-1 if s1 is less than s2.
char *s1 is the first string.
char *s2 is the second string.