BIND 10 #2101: memory-efficient version of InMemory Zone

[BIND 10 Development]

#2101: memory-efficient version of InMemory Zone
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  Next-
           Component:  data source   |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |  scalable inmemory
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 This feature consists of some other subfeatures:

 - Updates to libdns++ `LabelSequence`: #2086, #2087
 - Introduce `MemorySegment`: #2088
 - `RBTree` updates so it will be more memory efficient, using offset
   pointer and provide other support methods: #2089, #2090, #2091,
   #2092, #2093
 - Memory efficient `Rdata` encoding: #2094, #2095, #2096
 - Introduce `RdataSet` and define new `RRset`: #2097, #2098
 - InMemoryZone client/finer update: #2099 (this is a meta ticket)
 - Update `ZoneTable`: #2100

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Ticket URL: <http://bind10.isc.org/ticket/2101>
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BIND 10 Development