Fixes #2017.

mail module: properly set charset

sysctl module: fixed issue when checks_after fail on comparing keys with...

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings

postgresql_user: Add support for PUBLIC

This change enables users to add and remove permissions to all roles,
using the PUBLIC user. This is equivalent to using the PUBLIC keyword
in GRANT and DENY postgres SQL commands.

For example, see: <http://www.postgresql.org/docs/current/interactive/sql-grant.html>

Fixes #1833

uri module doc fixes

Fixed remove_key

Correct ec2_vol doc errors

zfs: documentation no longer breaks the formatting in webdocs

Fixing syntax error

running install_lib
byte-compiling /usr/lib/python2.6/site-packages/ansible/runner/action_plugins/add_host.py to add_host.pyc
SyntaxError: ('invalid syntax', ('/usr/lib/python2.6/site-packages/ansible/runner/action_plugins/add_host.py', 37, 92, '    def run(self, conn, tmp, module_name, module_args, inject, complex_args=None, **kwargs)\n'))

Fixes #1711.

We all agreed on the list that the ansible module common module snippet, since it's dynamically embedded in modules on the fly, should
be a BSD licensed snippet so that it's ok to write proprietary modules.  The actual license of Ansible (GPLv3) or any modules
written for ansible (any) do not change.