[Bro-Dev] #942: Generic log delaying mechanism for logging framework

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#942: Generic log delaying mechanism for logging framework
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 Reporter:  seth             |      Owner:  seth
     Type:  Feature Request  |     Status:  new
 Priority:  Low              |  Milestone:  Bro2.2
Component:  Bro              |    Version:  git/master
 Keywords:                   |
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 We need to add a mechanism for delaying log writes within the logging
 framework for the case where some asynchronous lookup needs to happen in a
 non-base script.  There are a few requirements:

  - The mechanism needs to copy the log record so that future modifications
 of the record aren't impacted unless deliberately modifying the delayed
 record.
  - Three functions in Log:: namespace to register and unregister delays
 for logs and one to get access to the delayed log by it's delay token.
  - Additional configuration option in logging framework to configure a
 default logging delay.  It's possible that we should set the default
 stream delay in the stream configuration record.

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Ticket URL: <http://tracker.bro-ids.org/bro/ticket/942>
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