Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComp

Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComplex type is missing from fortran
initialize variables so that static analyzer doesn't mistakenly think they are used uninitialized.
Move access of prefix until it is actually used
Remove DMDASplitComm2d(), used in one example that was not tested
Functions that do not return PetscErrorCode should not use PetscFunctionBegin/End paradgm
remove unneeded reassignment of same value
Missing CHKERRQ(); Mostly in Tao code
Remove clang static analyser warning about passing NULL variable to strncat()
missing newline in -ts_monitor_extreme
minor fixes for integer counters
Configure: Deal with '__func__' in C89 builds with newer Clang and GCC.
Jenkinsfile: Increased timeout for tests to 5 minutes.
3.9 changes: further clarify removal of -pc_factor_mat_solver_package
Options deprecations: add "PETSc" to inline warning
removing unused variable
MatShift support added to MATSUBMAT. Mimics MATSHELL functionality. Needed for matrix-free Hessians in TAO Newton-Line-Search methods.
Add -ts_monitor_extreme
Dev manual: add note on deprecating options database keys
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Conflicts:
src/dm/impls/plex/examples/tests/ex4.c

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Merge branch 'master' into knepley/feature-snes-ex13-spectral

* master: (2350 commits)
migrate warning fix from next-tmp
Revert "Remove dead code."
clarifying comment in the code
Remove dead

Merge branch 'master' into knepley/feature-snes-ex13-spectral

* master: (2350 commits)
migrate warning fix from next-tmp
Revert "Remove dead code."
clarifying comment in the code
Remove dead code.
Add JuMP citation
Copyedits and updates to developers manual
Add more protection to intrinsics
MPI: protect arguments in MPI macros
Add the missing conditionals for 64-bit build
Plex+VTK: Fix field type determination
Fix bug in name cleanup
Bib: Added ref
Plex+VTK: Fix field type determination
Plex: Updated test output - I am now hating this shit
forgot to save file after moving prototypes to petscsys.h
update Apple example project settings per Xcode
Two functions should actually be public, used, for example from Apple MacOS and iOS programs
includes should always be included relative to include directory
Apple removed old locations of docsets
SNES ex12: Updated test output
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Conflicts:
src/snes/examples/tutorials/ex13.c

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Merge branch 'barry/tao-to-new-test-harness' into barry/all-new-test-harness-branches

Merge branch 'master' into knepley/feature-plex-adjoint-prelim

* master: (60 commits)
petsc4py: update to use latest 3.8 snapshot
petsc4py: update to snapshot that syncs with 276c550
fix warni

Merge branch 'master' into knepley/feature-plex-adjoint-prelim

* master: (60 commits)
petsc4py: update to use latest 3.8 snapshot
petsc4py: update to snapshot that syncs with 276c550
fix warning
Plex ex26: Protect ExodusII stuff
DM: DMCreateSubDM() field argument should be const
TS ex46: Newlines and some numerical jitter
TS ex45: Newlines and some numerical jitter
TS ex11: Fixed indentation and time step numbering
SNES ex12: Update for DM view changes
Plex tests: Update to new DM output
Plex ex23: Use Nc not dim for vector fields
Plex: Default section now ignores cells hanging off boundary meshes
Plex: Viewer now reports the cell Height
Increase patchlevel to 3.8.3
Plex: Fixed DMPlexInterpolate() bugs - Do not copy associated data if we are not interpolating - Do not interpolate if we already have full depth
fix valgrind errors with using PetscObjectGetName()/SetName() with the same object - resulting in a free() before copy.
ex4: fix compile warning and update makefile
Minor fixes
Improving report_tests
PetscDS: Must initialize the default adjacency
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Conflicts:
include/petsc/private/dmimpl.h
include/petscdm.h
include/petscis.h
src/dm/impls/plex/plexcreate.c

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Merge branch 'master' into knepley/feature-plex-exodus-update

* master:
petsc4py: update to use latest 3.8 snapshot
petsc4py: update to snapshot that syncs with 276c550
fix warning
Plex ex26

Merge branch 'master' into knepley/feature-plex-exodus-update

* master:
petsc4py: update to use latest 3.8 snapshot
petsc4py: update to snapshot that syncs with 276c550
fix warning
Plex ex26: Protect ExodusII stuff
DM: DMCreateSubDM() field argument should be const
TS ex46: Newlines and some numerical jitter
TS ex45: Newlines and some numerical jitter
TS ex11: Fixed indentation and time step numbering
SNES ex12: Update for DM view changes
Plex tests: Update to new DM output
Plex ex23: Use Nc not dim for vector fields
Plex: Default section now ignores cells hanging off boundary meshes
Plex: Viewer now reports the cell Height
DM: Check IS block size in DMCreateSubDM()
DM: DMCreateSubDM() should take a const array
Plex ex26: Test for FEM dof layout and DMCreateSubDM() Contributed-by: Blaise A Bourdin <bourdin@lsu.edu>

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Merge remote-tracking branch 'origin/knepley/feature-subdm-test'

Plex ex26: Test for FEM dof layout and DMCreateSubDM()
Contributed-by: Blaise A Bourdin <bourdin@lsu.edu>