Resolve traceback when python-selinux is not installed

DOCUMENTATION: LaTeX template is back

Improve the error message for missing files

path_dwim the path given to with_fileglob

   ongoing work for the Booklet

fix DOCUMENTATION for user

mount: update example with mandatory option

Fix $last_result documentation and spelling tweaks - issue #1420

Document ssh_key options are in version 0.9

- 'state' is required, but wasn't in example

Signed-off-by: bleader <bleader@ratonland.org>

Reformat code: examples consistently

 - added terse syntax to modules.rst
 - added description of special variables to template module

multiprocessing.pool.  Pushing so it can get wider testing.

make --limit take a , as a separator as well as ; or :

Inventory script to gracefully handle AWS being down

Help git module work when working in 'no branch' scenario

Detect when on a 'no branch' branch.  If so, checkout the HEAD branch
as reported by 'git remote show <remote>'.  That should put the repo
back on a branch such that git can then merge changes as necessary.
In addition, removed hard-coded references to origin and replaced
with remote var.

Reverting as this as reported allows some variables to clobber each other.
We'll work on a different fix.

This reverts commit c5469f63.

Clarify how only_if works, also combined with with_items

- The old documentation stated not to quote the variable in the function, which is obviously wrong. When using lists or integers, we have to quote otherwise the startswith() method will trip over its non-existence.
- It was unclear that the only_if statement is processed for each item when doing with_items, so I added an example making it crystal clear how this can be used in your advantage (or why a non-existing list variable can break your logic if you expected the only_if to be processed once before running the task)

Fix ansible_ssh_host again

This time with unit tests to ensure it keeps working.

Added some info on the unit tests requirements