BIND 10 #1602: Introduce dns::LabelSequence class

[BIND 10 Development]

#1602: Introduce dns::LabelSequence class
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  new
                       Type:  task   |             Milestone:  Year 3 Task
                   Priority:  major  |  Backlog
                  Component:         |            Resolution:
  libdns++                           |             Sensitive:  0
                   Keywords:         |           Sub-Project:  DNS
            Defect Severity:  N/A    |  Estimated Difficulty:  0
Feature Depending on Ticket:  auth   |           Total Hours:  0
  performance                        |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 And one more method for `LabelSequence`: getHash(), which returns
 some simple hash value for the sequence.

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Ticket URL: <http://bind10.isc.org/ticket/1602#comment:1>
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