TODO
====

* comments: mark "emulated" (windows) functions
* unsetenv winapi? see http://old.nabble.com/-patch--(msvc)-use-more-modern-facilities-for-setenv()-unsetenv()-td15877005.html
* investigate F_FULLFSYNC fcntl and fsync on Mac OS
* nanosleep
* fdtruncate win32
* waitid

DONE
====

* INRIA request for extended UNIX:
  http://caml.inria.fr/mantis/view.php?id=5063
  http://caml.inria.fr/mantis/view.php?id=2533
  http://caml.inria.fr/mantis/view.php?id=3851
  http://caml.inria.fr/mantis/view.php?id=480
* mkdtemp (see Jane Street Core)
* sysconf: get system configuration constants. In particular, PAGESIZE,
  _SC_PHYS_PAGES, _SC_AVPHYS_PAGES, _SC_NPROCESSORS_CONF, _SC_NPROCESSORS_ONLN 
  (see Jane Street Core)
* sysinfo (see Jane Street Core)
