Fix wrong case for PETSc

Fix manual pages related to Fortran

Remove a couple of dead Fortran bindings

Fix docstring issues reported by linter

Fix -Wshorten-64-to-32

petsc/src/sys/utils/openmp/mpmpishm.c:227:88: warning: implicit conversion loses integer precision: 'PetscInt' (aka 'long') to 'int' [-Wshorten-64-to-32]
227 | PetscCallMP

Fix -Wshorten-64-to-32

petsc/src/sys/utils/openmp/mpmpishm.c:227:88: warning: implicit conversion loses integer precision: 'PetscInt' (aka 'long') to 'int' [-Wshorten-64-to-32]
227 | PetscCallMPI(MPI_Reduce(ctrl->is_omp_master ? MPI_IN_PLACE : cpu_ulongs, cpu_ulongs, nr_cpu_ulongs, MPI_UNSIGNED_LONG, MPI_BOR, 0, ctrl->omp_comm));
| ~~~~~~~~~~ ^~~~~~~~~~~~~

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Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90

Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90impl.h files. Also move uses of f90 to ftn when simple

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Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous ve

Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous versions!
- also clean up inconsistent PETSc code detected by new Fortran generation tools
- drop use of bfort
- automatically generate all the Fortran PETSc objects, enums etc from the include files
- generate most of the Fortran interface definitions and functions from the source code
- simplify the number and organization of Fortran modules

Co-authored-by: Jose E. Roman <jroman@dsic.upv.es>

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some code fixes

some doc/manual page fixes

Merge remote-tracking branch 'origin/release'

Fix typos

Merge remote-tracking branch 'origin/release'

Fix bug in PetscShmgetDeallocateArray needs to call PetscCheck(!shmdt(next->addr), since that is not called in the unmap on rank 0

Reported-by: Marsha Berger
Reported-by: Randy Leveque

Doc: Fix PetscStrreplace

Merge remote-tracking branch 'origin/release'

Improve some manual pages in KSP/SNES

Merge remote-tracking branch 'origin/release'

IS: Add PetscKDTree

Co-authored-by: Barry Smith <bsmith@mcs.anl.gov>

sys: Misc doc changes to Sort routines

sys: Add PetscFindCount and PetscSortedCheckDupsCount

Merge remote-tracking branch 'origin/release'

Minor housekeeping

Brain dead fixes for useless casts

Unifies all context destructors to have a form of PetscCtxDestroyFn == PetscErrorCode (*)(void **)

Changes the previous subset of destructor APIs that used PetscErrorCode (*)(void *) (mostly those t

Unifies all context destructors to have a form of PetscCtxDestroyFn == PetscErrorCode (*)(void **)

Changes the previous subset of destructor APIs that used PetscErrorCode (*)(void *) (mostly those that
used PetscContainer

- Now allows any context to be a PetscObject
- Will provide a cleaner mapping to bindings in other languages
- Simplifies the maintenance of PETSc source code; improves clarity

Not backward compatible, compiler warnings will tell users what functions need to be updated

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PetscGlobalMinMaxInt: fix asan warning

runtime error: negation of -2147483648 cannot be represented in type 'PetscInt' (aka 'int'); cast to an unsigned type to negate this value to itself

Fix more -Wshorten-64-to-32