rename
======

POSIX specification: http://www.opengroup.org/onlinepubs/9699919799/functions/rename.html

Gnulib module: rename

Portability problems fixed by Gnulib:

  * This function does not work when the source file name ends in a slash on some platforms: SunOS 4.1.

  * This function will not replace an existing destination on some platforms: mingw.

Portability problems not fixed by Gnulib:

     This function will not replace a destination that is currently opened by any process: mingw.