1096294 - Document the rsyslog log level settings.

Against my better judgement, I've documented another project's config
file in our documentation.

https://bugzilla.redhat.com/show_bug.cgi?id=1096294
update docs to show that async calls can return a 202, not a 409
Merge pull request #1196 from asmacdo/1148944

1148944 - remove 409 from REST API docs
Added a comma as per PR review.
Merge pull request #1199 from rbarlow/1096294

1096294 - Document the rsyslog log level settings.
making improvements suggested by Preethi
Merge branch '2.4-testing' into 2.4-dev
Merge branch '2.4-dev' into 2.5-testing
Merge branch 'mhrivnak-doc-updates-from-preethi' into 2.5-testing

Conflicts:
	docs/sphinx/user-guide/installation.rst