BIND 10 #908: per zone configuration for master address

[BIND 10 Development]

#908: per zone configuration for master address
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            Reporter:  jreed         |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  major         |                    Milestone:  New
           Component:  Unclassified  |  Tasks
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  High
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 Remove the server-wide Xfrin/master_addr and Xfrin/master_port.

 Implement per-zone configurations for the master address and port. This
 probably should be done in Zonemgr (and not Xfrin).

 BIND 9 allows defining a name to a list of masters with IP addresses,
 optional ports and optional TSIGs. Then per-zone configurations can use
 that name if desired or use the specific settings.

 This is required since currently you can't have different masters for
 different zones.

 For background see
 https://lists.isc.org/pipermail/bind10-dev/2011-May/002235.html

 See #811 is also about TSIG.

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Ticket URL: <http://bind10.isc.org/ticket/908>
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BIND 10 Development