BIND 10 #2429: support $TTL and TTL guessing in dns::MasterLoader

[BIND 10 Development]

#2429: support $TTL and TTL guessing in dns::MasterLoader
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  jinmei
            Priority:  medium        |                       Status:
           Component:  libdns++      |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20121218
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  3             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  loadzone-ng
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by muks):

 * owner:  muks => jinmei


Comment:

 I'll just answer one comment that was not discussed:

 Replying to [comment:11 jinmei]:
 > I don't understand the "2 calls" part of the comment.

 In this version of the API (as opposed to the non-static version suggested
 in the last review), `RRTTL::createFromText()` calls `parseTTLString()`
 twice, once during the check and second during `RRTTL` initialization in:
 {{{
         return (MaybeRRTTL(ttlval));
 }}}

 This branch is okay to merge now. The other points were discussed on
 Jabber.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2429#comment:13>
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