BIND 10 #2427: support $ORIGIN in dns::MasterLoader

[BIND 10 Development]

#2427: support $ORIGIN in dns::MasterLoader
-------------------------------------+-------------------------------------
            Reporter:  jinmei        |                        Owner:
                Type:  task          |  vorner
            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
-------------------------------------+-------------------------------------

Comment (by jinmei):

 Another important point: if I understand it correctly, this
 implementation doesn't handle this (of RFC1035) correctly:

 {{{
 have a comment.  Note that a $INCLUDE entry never changes the relative
 origin of the parent file, regardless of changes to the relative origin
 made within the included file.
 }}}

 It could also have been noticed from BIND 9's implementation.  This is
 another example of why we should learn from existing practice, rather
 than easily dismissing it and thinking we can do it better ourselves
 from the scratch.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2427#comment:10>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development