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Description of problem:
In the Postfix role README.md file under the "Role Variables" section, it doesn't document the role variables: postfix_check, postfix_backup, postfix_backup_multiple (possibly others?  not sure).  


Version-Release number of selected component (if applicable):
rhel-system-roles-1.0.0-31.el8.noarch


How reproducible:
Every time

Steps to Reproduce:
1. cat /usr/share/doc/rhel-system-roles/postfix/README.md

Actual results:
Several role variables are not documented under "Role variables" section

Expected results:
All role variables are documented under "Role variables" section

see also https://bugzilla.redhat.com/show_bug.cgi?id=1961861

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (rhel-system-roles bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4159