BIND 10 #1601: pass reference instead of shared pointer within AuthSrv

[BIND 10 Development]

#1601: pass reference instead of shared pointer within AuthSrv
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  major         |                    Milestone:  Next-
           Component:  b10-auth      |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:  auth
         Total Hours:  0             |  performance
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 This is probably marginal, but most of the internal methods used
 in AuthSrv could pass references when they pass shared pointers (not:
 not a reference to the shared pointer; real reference to the
 underlying object).

 Passing shared pointers have some extra cost due to its copy
 operation, so this will probably improve performance a bit.

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Ticket URL: <http://bind10.isc.org/ticket/1601>
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BIND 10 Development