BIND 10 #2432: define and implement base and libdns++ version of RRsetCollection

[BIND 10 Development]

#2432: define and implement base and libdns++ version of RRsetCollection
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            Reporter:  jinmei        |                        Owner:  muks
                Type:  task          |                       Status:
            Priority:  medium        |  reviewing
           Component:  libdns++      |                    Milestone:
            Keywords:                |  Sprint-20130108
           Sensitive:  0             |                   Resolution:
         Sub-Project:  DNS           |                 CVSS Scoring:
Estimated Difficulty:  5             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |  loadzone-ng
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by vorner):

 Ah, forgot two things.

 The `rdata_collection_base.cc` is effectively empty. Is it needed there?
 And,
 also, is it really possible to claim copyright of mostly empty file?

 And, another style thing. I don't think it is reasonable to do anything
 about
 it now, but for the next time, is it possible to commit by smaller chunks?
 For
 example, separate the base class and the concrete implementation?

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Ticket URL: <http://bind10.isc.org/ticket/2432#comment:9>
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