Reported hanging of no-password sudo in some cases.  Need to explore.

This reverts commit 87f6739e.

Conflicts:

	lib/ansible/utils/__init__.py

Support sudo alternatives that offer sudo-compatible interfaces

new module: sysctl to handle sysctl entry

Pacman module

add when_{failed,changed}, and extended when_{set,unset}

add apt_key module

get_service_status() is now using self.service_control() to check status

add filter_plugins to example ansible.cfg

Service mod.: Proper(?) handling of return code 69

Fix sudo user env

Adds -i to  make_sudo_cmd so target user's environment gets loaded when configurationslike this are used :


    - hosts: ubuntu 
      name: Install ruby for the configured ruby user 
      sudo: True 
      sudo_user: rubyuser 
      # should be ${ruby_user}, but can't for now because of #1665 
      tasks: 
      - name: Gets current ruby version 
        action: shell rbenv version 
        register: ruby_current_version 

This adds "69" to the return codes from the status command that should be
considered as not running. At least "django-celery" uses this return code,
maybe others::

    /venv/bin/python /code/project/manage.py celeryctl status
    echo $? # 69 when not running.

A bit of googling let me to http://tldp.org/LDP/abs/html/exitcodes.html and
on a Ubuntu Server 12.10 I get::

    ~# cat /usr/include/sysexits.h | grep 69
    #define EX_UNAVAILABLE	69	/* service unavailable */

I'm not sure if the content of sysexits.h is the same on other OS'es.

Pretty straightforward.  Give it a URL with an exported GPG key for signing an
Apt repository.  It downloads it and will install it using apt-key.  It's even
smart enough to tell if it's already there (i.e. actually tells you if it
changed or not).

Fixes a bug where init-scripts were not used

Various cleanup to run_command

* Rename fail_on_rc_non_zero to check_rc, much more succinct.
* Simplify method defintion
* Fix command module and drop shell=shell option; whether to use
  shell is determined by if args is a list.

Add run_command to module_common and update modules to use it.

This updates apt, apt_repository, command, cron, easy_install, facter,
fireball, git, group, mount, ohai, pip, service, setup, subversion,
supervisorctl, svr4pkg, user, and yum to take advantage of run_command
in module_common.py.

This adds a helper method that modules can call to execute a command via
subproces.  It takes two arguments: the command to run and
keyword options that control how the process is executed.  Supported
options are: fail_on_rc_non_zero, close_fds, and executable.
fail_on_rc_non_zero will call fail_json if the command fails.  If
args is a list, the command will be run with shell=False; otherwise, if
a string, it will be run with shell=True.  Otherwise, run_command() returns
the returncode, stdout, and stderr.

hacking/env-setup: remove unused sys import.

Prevent permission denied when cloning

Without read permission to the current working directory, git-clone will
fail:
root@host:~$ sudo -u git -H git clone \
  git://github.com/ansible/ansible.git /home/git/ansible
fatal: Could not change back to '/root': Permission denied

This commit ensures that the working directory is changed to the
parent-folder of the destination before doing the clone.

typo in ssh private key name

EC2 module should report back the public_dns_name too

Fixes #1854.