Description

   The strncasecmp function is case-insensitive. The returned
   lexicographic difference reflects a conversion to lowercase.
   The strncasecmp function is similar to the strcasecmp function,
   but also compares size. If the size specified by n is read before
   a NULL, the comparison stops.

   The strcasecmp function works for 7-bit ASCII compares only. Do
   not use this function for internationalized applications.