BIND 10 #1342: Reintroduce delayed restarts after #213

[BIND 10 Development]

#1342: Reintroduce delayed restarts after #213
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                   Reporter:         |                 Owner:  UnAssigned
  vorner                             |                Status:  reviewing
                       Type:         |             Milestone:
  defect                             |  Sprint-20111122
                   Priority:  major  |            Resolution:
                  Component:  Boss   |             Sensitive:  0
  of BIND                            |           Sub-Project:  Core
                   Keywords:         |  Estimated Difficulty:  4
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:         |
                  Internal?:  0      |
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Changes (by jelte):

 * owner:  jelte => UnAssigned
 * status:  assigned => reviewing


Comment:

 Turns out with the changes from 213, it's actually easier to implement
 this, so I've removed the legacy scheduler class and let the component
 class handle it's own restarting.

 Behaviour of restarts changed slightly; it'll now be restarted X seconds
 (default 10) after time of start, not time of death. But the calculation
 of restart time is in its own method so we can easily change the
 algorithm.

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Ticket URL: <http://bind10.isc.org/ticket/1342#comment:7>
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