TS ex45: Added some explicit integration

Merge branch 'barry/2022-01-02/minor-sellmat' into 'main'

MatSELL maintenance and documentation

See merge request petsc/petsc!4715

Add RK2B (the explicit midpoint method)

Change names of PetscGTE and PetscLTE because they were confusing and prone to mis-use

Commit-type: documentation
\spend 5m
Reported-by: Stefano Zampini

Update tests output

Fixes for the Intel OneAPI compiler and MPI

Commit-type: bug-fix, portability-fix, testing-fix
\send 1h
Reported-by: Satish Balay <balay@mcs.anl.gov>

Merge branch 'gbetrie/fix-dmnetworkaddcomponent' into 'main'

Gbetrie/fix dmnetworkaddcomponent

See merge request petsc/petsc!4658

Adding/modify tests on zero size components to several examples;
DMNetworkAddComponent(): the owning rank and all ghost ranks must call it to add a component and nvar in the same order
Update doc for

Adding/modify tests on zero size components to several examples;
DMNetworkAddComponent(): the owning rank and all ghost ranks must call it to add a component and nvar in the same order
Update doc for DMNetworkAddComponent
merge DMNetworkLayoutSetUp_Coupling() into DMNetworkLayoutSetUp() to remove duplication

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remove trailing newline from SETERRQ

Merge branch 'stefanozampini/split-tao' into 'main'

TAO: unify options for bounded Newton-Krylov

See merge request petsc/petsc!4581

ts/swarm example Two Stream instability

Merge branch 'ahamilton/ts-multirate-ex4-2021' into 'main'

add ts-multirate-ex4: an example using ts-multirate for shallow water equations

See merge request petsc/petsc!4571

Fix DMView_Plex_ASCII to have clearer indications of what the numbers after i-cells are (per rank)

Update the test output files

Commit-type: debugability
\spend 45m

add ts-multirate-ex4: an example using ts-multirate for shallow water equations

TS example: fix compiler warning

fix single precision tests

Merge branch 'knepley/feature-plex-csr-overlap' into 'main'

Plex: Add a nother alternative for CSR grph creation

See merge request petsc/petsc!4527

Plex: Add a nother alternative for CSR grph creation

TSSUNDIALS: add single-rank test with dense solver

Update ex76.c

Outer most KSPSolve() now errors if KSPSetErrorIfNotConverged() is set and KSP_DIVERGED_ITS

Clarified behavior of KSPSolve() with errors in manual pages

Reported-by: Pierre Jolivet <pierre@joliv.et

Outer most KSPSolve() now errors if KSPSetErrorIfNotConverged() is set and KSP_DIVERGED_ITS

Clarified behavior of KSPSolve() with errors in manual pages

Reported-by: Pierre Jolivet <pierre@joliv.et>
\spend 45m

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Fix missing ierr =, removed incorrect CHKERRQ()

Commit-type: error-checking, style-fix
\spend 45m

CHKSTRINGERROR() -> CHKERRSTR(), ierr -> err, and other CHK**() fixes

Vec: Fix VecTaggerComputeBoxes(), VecTaggerComputeIS() to return a boolean whose value is true if the list was created

Implicit Runge-Kutta integrators