BIND 10 #2368: [meta] complete and generic zone file parser and loader

[BIND 10 Development]

#2368: [meta] complete and generic zone file parser and loader
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                   Reporter:         |                 Owner:
  jinmei                             |                Status:  new
                       Type:  task   |             Milestone:  New Tasks
                   Priority:         |            Resolution:
  medium                             |             Sensitive:  0
                  Component:         |           Sub-Project:  DNS
  Unclassified                       |  Estimated Difficulty:  meta
                   Keywords:         |           Total Hours:  0
            Defect Severity:  N/A    |
Feature Depending on Ticket:         |
  loadzone-ng                        |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Description changed by jinmei:

Old description:

> This will eventually replace b10-loadzone and revise dns++ masterLoad().

New description:

 This will eventually replace b10-loadzone and revise dns++
 masterLoad().

 In the very initial phase, I propose introducing a generic lexer and
 master file parser using the lexer.  The parser initially only handles
 a limited set of entire syntax.  Then update the data source loader
 and b10-loadzone using them.  In the next phase we'll support
 more variations of master file syntax (no tickets are created for
 them).

 For the initial phase, we'll need to do:
 - generic lexer: #2369, #2371, #2372, #2373, #2374
 - generic parser: #2376, #2377 (and #2382)
 - zone loader: #2378, #279, #2380

 The following are bonus, but will be needed in later phases
 - other libdns++ objects updates: #2383, #2384
 - rdata updates: #2382, #2385, #2386, #2387, #2388, #2389, #2390, #2391,
 #2392

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Ticket URL: <http://bind10.isc.org/ticket/2368#comment:1>
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