/*D
   MPI_Comm_idup - nonblocking communicator duplication

Synopsis:
.vb
int MPI_Comm_idup(MPI_Comm comm, MPI_Comm *newcomm, MPI_Request *request)
.ve

Input Parameters:
. comm - communicator (handle)

Output Parameters:
+ newcomm - copy of comm (handle)
- request - communication request (handle)

.N ThreadSafe

.N Fortran

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

D*/

