/*D
   MPI_Close_port - close port

Synopsis:
.vb
int MPI_Close_port(const char *port_name)
.ve

Input Parameters:
. port_name - a port (string)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_OTHER

D*/

