BIND 10 #2441: update in-memory data source so it can load RRs in any order

[BIND 10 Development]

#2441: update in-memory data source so it can load RRs in any order
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  vorner
            Priority:  medium        |                       Status:
           Component:  data source   |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20130319
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  4             |                 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):

 Replying to [comment:10 muks]:

 > Does this look better:
 > {{{
 > XYZ.    [func]                muks
 >       The zone data loader now accepts RRs in any order during load.
 >         Before it used to reject adding non-consecutive RRsets. It
 >       expected records for a single owner name and its type to be
 >       grouped together. These restrictions are now removed.
 >         (Trac #2441, git ...)
 > }}}

 Please also mention it now suppresses duplicate RRs.  It was done in
 #2440 but I suggested to unify the entire changes in a single
 changelog entry on completion of this task.  Something like this:

 {{{
 XYZ.    [func]          muks, jinmei
         The zone data loader now accepts RRs in any order during load.
         Before it used to reject adding non-consecutive RRsets. It
         expected records for a single owner name and its type to be
         grouped together. These restrictions are now removed.  It now
         also suppresses any duplicate RRs in the zone file when
         loading them into memory.
         (Trac #2440, git 232307060189c47285121f696d4efb206f632432)
         (Trac #2441, git ...)
 }}}

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Ticket URL: <https://bind10.isc.org/ticket/2441#comment:11>
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