[tor-bugs] #17872 [metrics-lib]: Add support for recently added crypto and for hidden-service statistics

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#17872: Add support for recently added crypto and for hidden-service statistics
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 Reporter:  karsten      |          Owner:  karsten
     Type:  enhancement  |         Status:  needs_review
 Priority:  Medium       |      Milestone:
Component:  metrics-lib  |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
  Sponsor:               |
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Comment (by iwakeh):

 looks fine.
 (I would have implemented the "stringbuilder" and "switch on string" (for
 the touched classes) with this patch together, but postponing them is ok,
 too.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17872#comment:2>
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