Viwering PetscSection displays dof as dim in the ASCII files, fix to dof

doc(sf): Correct note for PetscSFCreateSectionSF

Section: Fixed PetscSectionCreateSubmeshSection() for unsorted subpointIS

PetscSF: Add test ex24 for testing overlapping sparse communication

PetscSF: Fix PETSCSFWINDOW for safe usage of addresses as keys

- Use addresses to identify dynamic windows only with `PetscSFRegisterPersistent()`,
otherwise address recycling makes this unsound.

PetscSF: Fix PETSCSFWINDOW for safe usage of addresses as keys

- Use addresses to identify dynamic windows only with `PetscSFRegisterPersistent()`,
otherwise address recycling makes this unsound.
- Compress empty processes out of window communication, because with NULL
for both the rootdata and leafdata a process cannot correcty identify
which in-process communications to use. Unlike for PETSCSFBASIC,
this problem is potentially fatal because ending a communication
can involve collective operations.

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PetscSF: add PetscSFGetDatatypeSize_Internal() for internal use

PetscSF: Create PetscSFRegisterPersistent()/PetscSFDeregisterPersistent()

PetscSF: use PetscSFRegisterPersistent()/PetscSFDeregisterPeristent() in examples

ISInvertPermutation_Stride: fix for identity case

SF - Ensure calls to `PetscLogEventBegin` are synchronized between processors

Fix potential place of integer overflow in PetscSection code

Merge remote-tracking branch 'origin/release'

Minor fixes to AO manual pages

Merge remote-tracking branch 'origin/release'

Docs: fix nonexisting functions and variables

Merge remote-tracking branch 'origin/release'

improve a few plex manual pages

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VI

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VIEWER_XXXX_() routines

Reported-by: James Wright
Thanks-to: Jeremy L Thompson

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Merge remote-tracking branch 'origin/release'

Fix error checking in DMDA for periodic cases where it cannot handle periodic boundary conditions

Also add error checking to MatFDColoring() to check for bad coloring input.

Also fix bug where call

Fix error checking in DMDA for periodic cases where it cannot handle periodic boundary conditions

Also add error checking to MatFDColoring() to check for bad coloring input.

Also fix bug where call to ISColoringGetIS() where the is already exists and the caller requests PETSC_OWN_POINTER

Reported-by: Richard Katz <richard.katz@earth.ox.ac.uk>

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SF: minor revision avoiding useless log events

Config: get rid of PETSC_HAVE_{I_MPI, MVAPICH2}_NUMVERSION and use the PETSC_PKG_ prefix

Config: get rid of PETSC_HAVE_MPICH_NUMVERSION and use petscpkg_version.h

Config: get rid of PETSC_HAVE_OMPI_MAJOR_VERSION and include it in petscpkg_version.h

Merge remote-tracking branch 'origin/release'

SF: add a workaround for an ompi-5.0.x bug not allowing null arrays when size is zero

Note the bug is fixed at https://github.com/open-mpi/ompi/pull/12614