[BZ 1128929] Update verbiage to clarify what files need to be updated.

(cherry picked from commit 9d3a214da79e48fcad8053b8ee879f05a420862e)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>
[BZ 1128929] One more revision to clarify that the encode utility can now be used for configuration values in general (not just passwords). Updated the name of the utilities, prompts, and command arguments to activate the feature.

(cherry picked from commit 269d0566850de6617b185b030df22e4d906b21b8)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>