Fixes #6047

  failed: [127.0.0.1] => {"failed": true, "parsed": false}
  invalid output was: Traceback (most recent call last):
    File "/tmp/ansible-tmp-1393950384.39-102240090845592/nova_compute", line 1328, in <module>
      main()
    File "/tmp/ansible-tmp-1393950384.39-102240090845592/nova_compute", line 241, in main
      except exc.Unauthorized, e:
  NameError: global name 'exc' is not defined

This prevents a traceback when the group is empty.
Fixes #6258

Fixes #5305

Fixed missing ansible.errors import in assert module

Add option to enable the sysctl -e option

Show more whitespace throughout playbook examples to encourage better standards in first playbooks folks write.

the primary name of the parameter in the examples.

Trim references to fireball as we want folks using accelerate or pipelining options.  Fireball is pretty well deprecated at this point, but will still be part of the release.

Fixes #5800

Update intro_configuration.rst

Fully delete 'ssh_old' and 'paramiko_alt' options

Typo in rabbitmq_plugin docs

Support ssh-ed25519 keys

The newest version of OpenSSH supports a new, wonderful key type. authorized_key incorrectly discards pubkeys of this type as busted because it doesn't recognize type signature.

If no group was specified, but a group by the same name as the user
exists, an error was raised in the situation where USERGROUPS_ENAB is
enabled in /etc/login.defs (which is the case for almost every major
linux distro). In this case, the user will be put in group 100 (which
is usually the "users" group on those same distros). This is currently
only done in the base class, as the issue may not exist on other
platforms like AIX or the BSDs.

Fixes #6210

Should be "plugins", not "users".

These transports have been removed in 33857855

stat module: mode is now returned as an octal and md5 call can be skipped.

Closes GH-6176

This way for mode we return in an octal format which is immediately usable compared to transforming it later.

added octal representation of mode and made md5 checksumming optional

Copy Module: Add the ability to set directory attributes on recursive copy.