Fix typos in intro_configuration.rst & constants.py

Make sure ssh pipes are empty before moving on

Resolves issue #5082

Code as it was would hit a scenario where one of the FDs was not ready for
reading the first time through -- but p.poll() would show the process as
complete. This would cause ansible to continue on, while leaving some content
left in a pipe.

The other scenario -- the one that causes the unclosed quote, is if we go
through select.select() and we do get stdout in the ready for reading -- we
read from it (9000 bytes), but that's not all that is there. Again we'd get to
the p.poll() check and it would be indeed not none, but we would have left some
of stdout on the FD and thus the json blob would be malformed.

Tested with and without full ssh debugging.
Tested with and without ControlPersist
Tested with and without ControlPersist sockets already created

This reverts commit 7f8863f9.

Fix typo for ANSIBLE_FORCE_COLOR in Changelog

Fix typo in ANSIBLE_FORCE_COLOR

Account for instances that have not yet been registered. Fixes #5076

apt: update index before trying to autoinstall python-apt

Fix issue #5214: hostname persistence on RedHat/CentOS

Fix link to playbooks loops

Cast the retrieved `retries` var to an int before incrementing as it may...

For example, the following method of calculating the value will result in a type error:

    appstatus_waitfor: 4  # Minutes
    appstatus_delay: 5 # seconds
    appstatus_retries: "{{ mins * 60 / delay }}"

Fix loading from cache in ec2.py inventory plugin.

remove author section, references old email address

Clarify docs readme about wordpress

user module: force= and remove= should not be mutually exclusive

ec2 inventory now include Ansible 1.3 style _meta data each host.

Added support for parsing in the SLES patch level correctly

add fnmatch() support for apt remove too (just like install)

Add documentation for usage of encrypted postgresql passwords.

Fix apt module to be able to install package by giving just a provides a...

The apt module check if a packag eis valid by loking in the cache, checking only for
full name, while it should also check that the name is not just provided.
Fix https://github.com/ansible/ansible/issues/5177