Fix a typo in the prompt code

This is unfortunately related to not being able to reuse the same code that was tested.

Add an only_if option to vars_prompt to make prompts conditional

Sometimes you may want to allow variables through host_vars or inventory, but prompt for a value if it is not set or if the value does not conform to something specific. This option allows you to specify when you want to offer a prompt.

This patch also moves check_conditional to utils, and adds an is_unset() function which is nicer to read:

    only_if: "not is_set('${var}')"

vs

    only_if: "is_unset('${var}')"

Modified 'ok' to 'changed' when a change has occured

Template the variable prompt to customize the message

We have a password-prompt for a configurable login name. Since we require to ask the password for this specific login, it is important to indicate what password needs to be prov ided on the prompt. So the prompt needs to be templated. That's what this patch does.

[Issue #1075] Fixing setup module fails if PATH is not set on target hos...

User-expand the destination path of the git module

Distribution packaging should install all manpages

Allow including files through variables

Added DOCUMENTATION to lineinfile module

Add an ansible_ssh_host inventory variable

Added cases for 'dead but subsys locked' status

Tweak DOCUMENTATION YAML as per latest 991

closes #1069

$FILE{file} will be replaced with the contents of "file"
$PIPE{cat file} will be replaced with the output of "cat file"

This reverts commit bf47bb47.

Conflicts:

	lib/ansible/utils.py
	test/TestUtils.py

Fix on older python versions, plus various improvements

This change includes:

 - (on possibly older python versions ?) a string variable test using the 'is' operator fails (so it always return ok immediately after initial delay)
 - add a missing socket.settimeout() for the state=started case (if the machine does not exist, timeout defaults to 60 seconds)
 - add a connect_timeout option to customize the default connection timeout
 - use socket.shutdown(2) to close immediately
 - return the elapsed time

First attempt at standardizing DOCUMENTATION string

fix Makefile date command error on OSX