Users manual: fix old command-line option -pc_ilu_fill

Merge remote-tracking branch 'origin/release'

Merge branch 'psanan/docs-upgrade-sphinx-4.2.0' into 'release'

Docs: upgrade to Sphinx 4.2.0

See merge request petsc/petsc!4475

doc: fix git related install instructions

Reported-by: liang@geoazur.unice.fr

Merge branch 'psanan/docs-fix-console-snippets' into 'release'

Docs: update console snippets

See merge request petsc/petsc!4470

doc: fix build errors

Fixed mangled writing in FAQ.

Docs: upgrade to Sphinx 4.2.0

The functions overridden by our custom extension, visit_Text and
visit_literal_block, have not changed since 3.5.4.

Docs: Update metadoc on console/command prompt

Docs: update copybutton extension settings to recognize $ prompt (with trailing space)

Docs: add console labels to code blocks missing them

Docs: convert >>> prompts to $ and remove lone >>> lines

Docs: add missing $ to console snippets

Docs: replace > with $ in all console snippets

Merge remote-tracking branch 'origin/release'

- Remove petsccublas.h and petschipblas.h

- Replace the current CUPM initialization infrastructure with PetscDevice.
- Remove -petsc_use_default_null_stream and -[cuda|hip]_synchronize options
- Remove PetscCUDASynchronize and PetscHIPSynchr

- Replace the current CUPM initialization infrastructure with PetscDevice.
- Remove -petsc_use_default_null_stream and -[cuda|hip]_synchronize options
- Remove PetscCUDASynchronize and PetscHIPSynchronize
- Remove PetscCUDAInitialize(), PetscCUDAInitializeCheck(), PetscHIPInitialize(), and
PetscHIPInitializeCheck()
- Remove PetscCUBLASInitializeHandle(), PetscCUSOLVERDnInitializeHandle(),
PetscHIPBLASInitializeHandle(), and PetscHIPSOLVERInitializeHandle().
- Remove petsc_gputimer_begin and petsc_gputimer_begin
- Add -device_enable, -device_select and -device_view options
- Replace -[cuda|hip]_device with split options -device_enable_[cuda|hip] and -device_select_[cuda|hip]
- Replace -[cuda|hip]_view with -device_view_[cuda|hip]
- Add PetscDeviceInitType
- Add PetscDeviceInitialize() and PetscDeviceInitialized()
- Add PetscDeviceView()

show more ...

- Add MPI_Comm_get/set_name to MPIUNI

Merge branch 'psanan/docs-migrate-classic-to-doc-tree' into 'release'

Migrate data for classic build from src/docs to doc/classic

See merge request petsc/petsc!4434

Merge branch 'psanan/docs-update-sphinx-metadocs' into 'release'

Docs: update Sphinx meta-docs

See merge request petsc/petsc!4467

Docs: migrate data for classic build from src/docs to doc/classic

Merge branch 'psanan/docs-main-fixes' into 'main'

Docs: re-add dev changes link and resolve warnings in dev.rst

See merge request petsc/petsc!4466

Merge branch 'psanan/docs-more-sensitive-ci' into 'release'

Docs CI: error on Sphinx warnings and disallow failure

See merge request petsc/petsc!4415

Merge remote-tracking branch 'origin/release'

Merge branch 'jacobf/2021-10-02/more-cxx-dialect-detection' into 'main'

Detect C++ Dialect from Compiler Flags

See merge request petsc/petsc!4403