* Build HTTPSClientAuthHandler more similarly to how HTTPSHandler works
* Add docs for new client cert authentication
* Support older versions of python
* Simplify logic
* Initial support for client certs in urls.py
* Add an extra test
* Add a get_url test for client cert auth
* Add additional test for client cert auth, with validation and ssl mismatch
* Skip assert when http tester not available
* Update version_added for new options
* Fix `iterators` test for osx.
* Enable `git` test for osx.
* Enable `get_url` test for osx and freebsd.
* Remove unused SNI_URI from uri test.
* Use ansible hosted SNI host oustside docker.
* Enable `uri` test for osx and freebsd.
* Enable `gathering_facts` test for osx.
* Skip single task on osx until test is fixed.
This change corrects problems reported by the `yamllint` linter.
Since key duplication problems were removed in 4d48711, this commit
mainly fixes trailing spaces and extra empty lines at beginning/end of
files.
