BIND 10 #2445: suppress initial log

[BIND 10 Development]

#2445: suppress initial log
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |  UnAssigned
            Priority:  medium        |                       Status:
           Component:  Boss of BIND  |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20121204
         Sub-Project:  Core          |                   Resolution:
Estimated Difficulty:  4             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by jelte):

 * owner:  jelte => UnAssigned
 * status:  assigned => reviewing


Comment:

 it was doable :)

 So here is a version that optionally creates a new specialized logger
 appender (instead of the default stdout), during initialization of the
 logging system. It stores all logging events until an actual specification
 is processed, at which time all stored events are replayed to the now
 fully configured logger. Should this for some reason never happen (say, it
 can't connect to msgq), everything that is not replayed (i called it
 flushed) is dumped to stdout.

 It does not use a ring buffer but a simple vector of logging events, and
 it is only usable once (after it has been flushed it will refuse to accept
 new events).

 I've updated the components to enable this, and any output that still goes
 to stdout or stderr is because the offending program is writing directly
 there, which should be addressed separately. But apart from that, this
 should also solve #1898.

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Ticket URL: <http://bind10.isc.org/ticket/2445#comment:9>
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