bugfix: MPI_Barrier(PETSC_COMM_WORLD) -> MPI_Barrier(PetscObjectComm((PetscObject)ctx))

use Mvctx_mpi1 in MatGetMultiProcBlock_MPIAIJ()

use Mvctx_mpi for pcredundant

further cleanup

cleanup ISGetSeqIS_SameColDist_Private()

fix bug for ISGetSeqIS_SameColDist_Private()

add ex211.c for debugging

add Mvctx_mpi1 for mat-mat ops and MatCreateSubMatrix

Merge remote-tracking branch 'origin/Fande-Kong/MatResetPreallocation'

Merge remote-tracking branch 'origin/hzhang/fix-Matdup_ptap/maint' into next-tmp

AIJMKL now uses PetscObjectState to determine if MKL matrix handle must be rebuilt.

Merge remote-tracking branch 'origin/hongzh/remove-bitarray-ell'

bugfix for MatDuplicate_MPIAIJ_PtAP
Reported-by: Samuel Lanthaler <s.lanthaler@gmail.com>

Merge remote-tracking branch 'origin/maint'

Initialize nstages in MatCreateSubMatrices_MPIAIJ() for build warning
Reported-by: Jed Brown <commits-reply@bitbucket.org>

Merge remote-tracking branch 'origin/pr795/pieter_ghysels/update-strumpack-2.1.0/master'

Merge branch 'maint'

* maint:
Spell check: interger -> integer
petscsys.h : partial man page cleanup
configure exodusii: pass HDF5_DIR to Exodus cmake
Docs: DMPlex man page and source commen

Merge branch 'maint'

* maint:
Spell check: interger -> integer
petscsys.h : partial man page cleanup
configure exodusii: pass HDF5_DIR to Exodus cmake
Docs: DMPlex man page and source comments fixes
Docs: Manual: clarifications for DMPlex chapter

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Spell check: interger -> integer

Set matrix assembled state to true, otherwise -ksp_view fails.

Move declarations of variables to the top of the function.

Enable the fortran interface for MatSTRUMPACKSetReordering,
by defining the enumeration in the fortran interface.

Remove routines to set HSS minimum front size
(not supported in strumpack yet).

Update to some strumpack functions.
Add a routine to set the HSS leaf size.

update the strumpack interface

Update strumpack interface to 2.0.1.