Merge remote-tracking branch 'origin/release'

Remove non-existing functions from documentation

CHKERRQ() -> CHKERRMPI()

Merge remote-tracking branch 'origin/release'

petscviewer: fix the fortran bindings of XXXViewFromOptions when called with obj=PETSC_NULL_XXX

Merge branch 'jolivet/feature-propagate-share' into 'master'

Propagate prefix name in PC[ASM|BJACOBI|GASM] and share factorizations in PCHPDDM

See merge request petsc/petsc!3608

General fixes

PetscOptionsInsertFile: Refactor to better support YAML options

* Filenames with '.yaml' or '.yml' extension are inserted as YAML options
* Appending ':yaml' to a filename forces insertion as YAML o

PetscOptionsInsertFile: Refactor to better support YAML options

* Filenames with '.yaml' or '.yml' extension are inserted as YAML options
* Appending ':yaml' to a filename forces insertion as YAML option

The previous rules propagate to PetscInitialize(..., file, ...) as well as
command line option `-options_file`

show more ...

YAML: Inserting all files/strings seen in other files and command line

PetscOptions: Add public #define PETSC_MAX_OPTION_NAME

PetscOptionsInsertArgs: Remove workarounds for legacy MPICH-1 P4

Merge remote-tracking branch 'origin/release'

PetscOptionsPrefixPush: Accept numbers if the stack is not empty

PetscOptionsClearValue: Also clear 'help_intro' slot

PetscOptionsDestroyDefault: Fix possible NULL-dereference

PetscOptionsUsed: Fix for case-insensitive string comparison

Merge remote-tracking branch 'origin/release'

Enhancements to YAML options

* Pass PetscOptions object to PetscOptionsInsertFileYAML().

* PetscOptionsInsert{File|String}YAML() are now always available and
will fail at runtime if PETSc was not

Enhancements to YAML options

* Pass PetscOptions object to PetscOptionsInsertFileYAML().

* PetscOptionsInsert{File|String}YAML() are now always available and
will fail at runtime if PETSc was not configured with YAML.

* Mapping keys starting with '$$' are considered dummy and not inserted.
These keys can be used with `!include` tags and for the definition of
YAML anchors to be expanded later with the merge key '<<'.

* Sequences of one-mappings insert an option with the list of keys.
For example, the following YAML options

```yaml
map:
- key0: abc
- key1: xyz
- key2: 123
```

insert the following options

```
-map key0,key1,key2
-map_key0 abc
-map_key1 xyz
-map_key2 123
```

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PetscOptionsInsertFile: Run PetscStrreplace() on input filename

PetscOptionsInt: fix manpage to match the macro def - where the first arg (PetscOptionsObject) is predefined

Reported-by: Carsten Uphoff <uphoff@geophysik.uni-muenchen.de>

PetscRandom: add CURAND support

Merge remote-tracking branch 'origin/release'

Consume -help in PetscOptionsSetValue() so it can be set from RC file etc.

Fix #795

PetscSF: need to initialize backends to access malloc functionality

PetscOptionsCheckCUPM: Fix warning

invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]