check that updates are accepted and rejected as expected under the
following scenarios:

* check krb5-subdomain-self-rhs match PTR
* check krb5-subdomain-self-rhs no-match PTR
* check krb5-subdomain-self-rhs match SRV
* check krb5-subdomain-self-rhs no listed types match (SRV & TXT)
* check krb5-subdomain-self-rhs no-match RDATA (SRV)
* check krb5-subdomain-self-rhs no-match TYPE (TXT)
* check krb5-subdomain-self-rhs delete PTR (matching PTR)
* check krb5-subdomain-self-rhs delete PTR (matching PTR with non-matching
  PTR)
* check krb5-subdomain-self-rhs delete ANY (matching PTR)
* check krb5-subdomain-self-rhs delete ANY (matching PTR with non-matching
  PTR)
* check krb5-subdomain-self-rhs delete SRV (matching SRV)
* check krb5-subdomain-self-rhs delete SRV (matching SRV with non-matching
  SRV)
* check krb5-subdomain-self-rhs delete ANY (matching SRV)
* check krb5-subdomain-self-rhs delete ANY (matching SRV with non-matching
  SRV)

* check ms-subdomain-self-rhs match (PTR)
* check ms-subdomain-self-rhs no-match (PTR)
* check ms-subdomain-self-rhs match (SRV)
* check ms-subdomain-self-rhs no-match (SRV)
* check ms-subdomain-self-rhs delete SRV (matching SRV)
* check ms-subdomain-self-rhs delete SRV (matching SRV with non-matching
  SRV)
* check ms-subdomain-self-rhs delete PTR (matching PTR)
* check ms-subdomain-self-rhs delete PTR (matching PTR with non-matching
  PTR)
* check ms-subdomain-self-rhs delete ANY (matching PTR)
* check ms-subdomain-self-rhs delete ANY (matching PTR with non-matching
  PTR)
* check ms-subdomain-self-rhs delete ANY (matching SRV)
* check ms-subdomain-self-rhs delete ANY (matching SRV with non-matching
  SRV)