BIND 10 #1614: in memory loader should be able to load RRSIGs correctly

[BIND 10 Development]

#1614: in memory loader should be able to load RRSIGs correctly
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                   Reporter:         |                 Owner:  jinmei
  jinmei                             |                Status:  accepted
                       Type:         |             Milestone:
  defect                             |  Sprint-20120207
                   Priority:  major  |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  5
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 trac1614 is ready for review.

 There's one, not directly related cleanup: 92295a5.  But it should be
 obviously correct and safe, and as noted in the commit log it helped
 the main code a bit cleaner (or less ugly).

 I also updated masterLoad() in libdns++ so that it can separate RRSIGs
 of different type covered (aba3a76).

 I'd consider this a kind of a bug fix, so it'd be worth a changelog
 entry.  This is the proposed one:
 {{{
 365.?   [bug]           jinmei
         libdatasrc: in-memory data source could incorrectly reject to load
         zones containing RRSIG records.  For example, it didn't allow
         RRSIG that covers a CNAME RR.  This fix also makes sure find()
         will return RRsets with RRSIGs if they are signed.
         (Trac #1614, git TBD)
 }}}

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Ticket URL: <http://bind10.isc.org/ticket/1614#comment:4>
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