Fixes #6806

Scrub choices=BOOLEANS from remaining core module references.  Correct form in argument_spec is type='dict'.

Add option to enable the sysctl -e option

the sysctl command. Calling sysctl should also not be true by default

and add a sysctl_set parameter to manage the values in /proc

* Added in support for freebsd-style sysctl commands
* Replaced some functionality that was provided by module_common
* Simplified some logic in a couple of places (ie, not checking
  a split with len() but instead limiting the split to 1)

Fixes #3380

Fixes #3931

  Migrated all examples: in DOCUMENTATION=''' string to standalone EXAMPLES=''' string
  Added deprecation warning to moduledev.rst and remove deprecated example from it
  Fixed up a few typos and uppercased some acronyms.
  add consistency to how EXAMPLES are formatted

step
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>

Both modules seboolean and zfs have not been adapted since they defer from the default (either by having a 'null' or special state, or prefering "on"/"off" for state indication.

It s not necessary to write an empty string for the file to be created.

When destination sysctl file is missing, it is created.
But, for idempotency purposes, the creation process now takes place just before it is used, in the
main code path so an empty file is not left over if the code
module.fail_jsons before the file is really used.

When syscl file was missing, sysctl module was complaining about it and
bailing out.
This behaviour prevents usage of /etc/sysctl.d directory, present in
some distributions.
This patch accepts a missing sysctl.conf file so sysctl.d directory can
be used.
However, it will bail out if the destination directory doesn't exist.

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings

Now handle positive integer value in virtual files if they are separated
by group of space characters where the count is unpredictable.
Thanks to romeotheriault for filing this bug.