BIND 10 #2862: update b10-auth to recognize data source memory segments

[BIND 10 Development]

#2862: update b10-auth to recognize data source memory segments
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  New
           Component:  b10-auth      |  Tasks
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |  shared memory data source
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Description changed by jinmei:

Old description:

> Subtask of #2830.  Depend on #2861
>
> When the main thread knows the data sources are ready, it gets a list
> of some info of the data sources using the API added in #2835.
>
> In this task, we'll do the first part of (the reader side of)
> http://bind10.isc.org/wiki/SharedMemoryIPC#a5.1.InitialStartup
> that is, if there's any WAITING state of segment, subscribe to the
> !MemorySegmentReaders group.

New description:

 Subtask of #2830.  Depend on #2861

 When the main thread knows the data sources are ready, it gets a list
 of some info of the data sources using the API added in #2835.

 In this task, we'll also do the first part of (the reader side of)
 http://bind10.isc.org/wiki/SharedMemoryIPC#a5.1.InitialStartup
 that is, if there's any WAITING state of segment, subscribe to the
 !MemorySegmentReaders group.

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Ticket URL: <http://bind10.isc.org/ticket/2862#comment:1>
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