Replacement tests and validations

Let's start with the DNS validations; first, we'll validate the SOA and NS records for our poa.msdcbrz.eall.com.br domain as follows:

leal@debian7:~$ dig -t any poa.msdcbrz.eall.com.br
…
;; ANSWER SECTION:
poa.msdcbrz.eall.com.br. 900  IN  A  192.168.1.1
poa.msdcbrz.eall.com.br. 3600  IN  NSdebian7.poa.msdcbrz.eall.com.br.
poa.msdcbrz.eall.com.br. 3600  IN  SOAdebian7.poa.msdcbrz.eall.com.br. hostmaster.poa.msdcbrz.eall.com.br. 52 900 600 86400 3600
…

Now let's see how the entries are for _msdcs.poa.msdcbrz.eall.com.br:

…
dig -t any _msdcs.poa.msdcbrz.eall.com.br
;; ANSWER SECTION:
_msdcs.poa.msdcbrz.eall.com.br.  3600 IN  NSdebian7.poa.msdcbrz.eall.com.br.
_msdcs.poa.msdcbrz.eall.com.br. 3600 IN SOAdebian7.poa.msdcbrz.eall.com.br. ...

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