Use "brew list <name>" instead of grepping the output of "brew list". Fix for #5488

Return early from setup step when possible

For loops can be inefficient, particularly when doing a dot command with
them. https://wiki.python.org/moin/PythonSpeed/PerformanceTips#Loops and
https://wiki.python.org/moin/PythonSpeed/PerformanceTips#Avoiding_dots...

This patch makes use of list comprehensions to be as efficient as
possible while still retaining order. Efficiency was lost a bit when
switching away from sets() but this gains some of it back.

Fixed typo in example documentation

The _list_available_hosts call can be lengthy, and in the case where
gather_facts is disabled the call is pointless. So re-arrange the logic
to return early from _do_setup_step when gather_facts is false.

Remove code underlying when_* and only_if, which are deprecated features slated for removal in the 1.5 release.

Resolves issues with newer versions of pip not having a --use-mirrors paramater for the install command

We have had only_if, when_foo, etc, deprecated for a while and said they would be removed in 1.5.  Now they are, with friendly error messages still.

Users of these features should use "when:" as documented at docs.ansible.com.

Similarly, include + with_items has been removed.  The solution is to loop
inside the task files, see with_nested / with_together, etc.

build manpages.

Some brew packages are not listed with their package name, e.g. libjpeg.

service_module: Fixed false positive on initctl as enable_cmd

bad closing quote in footer

Fixes #4935 Synchronize module: set destination to an fqdn if connection is not local, and abide by ansible_remote_user

synchronize: allow ansible_ssh_host to be templated

Fix a small typo

fix various documentation xrefs

Fix documentation example for the fail module