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

basic AIX network facts

Fix issue #5043: ec2_vpc module wait=yes state attribute retrieval

rax_required_together is a function

Fix ansible.spec to handle opensuse and fedora

Fix for RPM build on opensuse

#5089 hack-fix assemble module

add supported docker version to docs

Ensure test_command tests are actually correct

Add blank line before rst directive

Use ovirtsdk if it installed, but fall out gracefully if it is not

Use h2 for version headings in Changelog to allow deeplinking

The word skipped only has 2 p's not 3

Fix new new module_style determination. Fixes #5148

hostname module: add support for Amazon Linux

Added a parameter for dest_port and also check ansible_ssh_port inventory variable.

Using
```
assert 'changed' in result
```
doesn't actually check if something is changed, which is presumably
the reason for the assertion. What is actually needed is
```
assert result.get('changed')
```
which checks that changed is set and not False. Tests still pass after
this change

Fix checking for existence of EC2 tags

authorized_key module: rewrite options to dict parser, fixes #5032

Fixed hostname module for RHEL6 Workstation