* stdlib/msort.c: Include stdint.h.
(struct msort_param): New type.
(msort_with_tmp): Use struct msort_param pointer for unchanging
parameters. Add optimized handling for several common sizes
and indirect sorting mode.
(qsort): Adjust msort_with_tmp callers. For big S use indirect
sorting.
Suggested by Belazougui Djamel .
* stdlib/Makefile (tests): Add tst-qsort2.
* stdlib/tst-qsort2.c: New test.
