This shouldn't generally be needed unless you're working in an environment
that uses rediculously long FQDNs; if the name is too long, you wind up
hitting unix domain socket filepath limits enforced by ssh.

The default behavior is to update_cache if changed.

If you add more then one repo, you may not want to update cache for every repo separately.
So you can now disable update_cache with this new option e.g. update_cache=no

Updating cache can also be handled using the apt module.

Fixes #4111

Fixes #4104

Merge branch 'fix_changed_for_yum_group' of https://github.com/hnakamur/ansible into hnakamur-fix_changed_for_yum_group

* 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

Fixes #3615
Fixes #3572

Also slight modification to the error message in the earlier commit that
modified the update-rc.d detection portion of the code

Fixes #3474

By default, the service module had assumed that if the system had the
update-rc.d binary, the service was either managed via upstart or standard
sysV init-style scripts. This patch adds a check for systemctl ahead
of the other methods when update-rc.d is detected, and also simplifies
the logic around the detection of systemctl-managed services

Fixes #4068

This reverts commit ecc2b6e7.

Fixes #4069

Fixes #4026
Fixes #3989

Fixes #4025

Nova_compute wait_for fixes

Fixed -e "" on ansible-playbook.

The required package for selinux is libselinux-python