- update to 3.4.0:
* Do not fail on certain config option help strings
* Updated from global requirements
* enhance sphinx integration to allow links to option definitions
* Remove argparse from requirements
* Updated from global requirements
* replace reference to default value in option help text in docs
* add built-in options to auto-generated documentation
* register the built-in options for the config generator to find
* Add reST work label for configuration options
* Allow port number with 0
* Replace deprecated library function os.popen() with subprocess
* Fix can't generate config sample with non-None value
* Fixed deprecated_for_removal warning generation
* Module index grouping
* Docs class links
* generator: ignore doubles
* Numerous corrections to the docstrings
* Make oslo-config-generator fail gracefully when no arguments
* Replace assertEqual(*, None) with assertIsNone in tests
* Python 3 deprecated the logger.warn method in favor of warning
* Replace assertEqual(None,*) with assertIsNone(*)
* Cleanly handle an undefined attribute reference
* Replace assertEqual with assertTrue and assertFalse
* assertIsNone(val) instead of assertEqual(None,val)

- Update to version 3.2.0
* Capitalize IP
* Add support for a deprecation reason
* Removes MANIFEST.in as it is not needed explicitely by PBR