BIND 10 #2427: support $ORIGIN in dns::MasterLoader

[BIND 10 Development]

#2427: support $ORIGIN in dns::MasterLoader
-------------------------------------+-------------------------------------
            Reporter:  jinmei        |                        Owner:
                Type:  task          |  vorner
            Priority:  medium        |                       Status:
           Component:  libdns++      |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20121218
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  3             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  loadzone-ng
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by jinmei):

 And another interesting case:

 {{{
 foo.example.com. IN A 192.0.2.1
 $INCLUDE some_file ; which ends with "bar.example.com. IN A 192.0.2.2"
      IN AAAA 2001:db8::1
 }}}

 Which name should be used for the AAAA RR?  RFC1035 doesn't seem to
 be clear on this point; BIND 9 uses foo.example.com; NSD uses
 bar.example.com.  In my understanding, your current implementation
 behaves like NSD.

 My suggestion is:
 - Ask the question at bind10-dev anyway
 - Behave like BIND 9 (unless it turns out to violate some standard spec)
 - warn it if the owner name of the first RR after $INCLUDE is missing

 but since these seem to be implementation-dependent, we might defer it
 to a separate ticket, considering our current status toward the
 release.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2427#comment:11>
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