BIND 10 #2832: extend data source config to specify shmem segment params

[BIND 10 Development]

#2832: extend data source config to specify shmem segment params
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  UnAssigned
            Priority:  medium        |                       Status:
           Component:  Unclassified  |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20130423
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  2             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  shared memory data source
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by jinmei):

 Replying to [comment:11 pselkirk]:
 > Added support for 'cache-type' (using vorner's terminology) in
 datasrc.spec.
 >
 > Does this need a lettuce test or anything else at this point?

 I'd add a few trivial unittests: explicitly setting cache-type to
 "local" and see it doesn't cause disruption, setting it to "something
 bogus" and confirm it's rejected (I believe it's rejected).

 Also, as I suggested before, I'd have suggested explicitly mentioning
 whether we need a changelog entry for this task in the ticket log
 (even if it's deemed too obvious to mention, until you are
 sufficiently familiarized with the practice).  And, in this case, it
 might not be that obvious even if the change is very small, because
 it extends the user interface.  But, in the end, I would personally
 skip a changelog at this point - until we actually support other types
 of cache-type it's almost meaningless.

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Ticket URL: <http://bind10.isc.org/ticket/2832#comment:12>
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