MPI_Keyval_free - Frees attribute key for communicator cache attribute

       The LAM Team would like the thank the MPICH Team for the handy program to generate man  pages  ("doctext"
       from  ftp://ftp.mcs.anl.gov/pub/sowing/sowing.tar.gz ), the initial formatting, and some initial text for
       most of the MPI-1 man pages.

keyval - Frees the integer key value (integer)

       keyfree.c

LAM/MPI 7.1.4                                       6/24/2006                                 MPI_Keyval_free(3)

       For  more  information,  please  see the official MPI Forum web site, which contains the text of both the
       MPI-1 and MPI-2 standards.  These documents contain detailed information about each MPI function (most of
       which is not duplicated in these man pages).

       http://www.mpi-forum.org/

       MPI_Keyval_free -  Frees attribute key for communicator cache attribute

       This  function  is  deprecated.  It has been replaced with an MPI-2 function (see the "See also" section,
       below), which provides the same functionality.  This function is (or effectively is)  a  wrapper  to  the
       replacement  function,  anyway.   User programs should use the MPI-2 replacement function instead of this
       function.

       Some functions are deprecated because their names did not conform to the stricter naming  conventions  of
       MPI-2; others are deprecated because they have been replaced with more flexible functionality.

       MPI_Comm_create_keyval

       #include <mpi.h>
       int MPI_Keyval_free(int *key)