Description of problem:

The "ipa cert-revoke -h" command prints the following:

  --revocation-reason=INT
                        Reason for revoking the certificate (0-10)

Some users probably don't know which numbers corresponds to which revocation
reasons.


Expected results:

The "ipa cert-revoke -h" output could include a list of the numbers and the
corresponding reasons to revoke a certificate. Or, if the list is available in
a man page somewhere, the "--revocation-reason" description could just refer
the users to that man page.