[tor-bugs] #21574 [Applications/Tor Browser]: Add zh-CN manual link; also improve link localization code

[Tor Bug Tracker & Wiki]

#21574: Add zh-CN manual link; also improve link localization code
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     Reporter:  arthuredelstein      |      Owner:  tbb-team
         Type:  defect               |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  TorBrowserTeam201602,
     Severity:  Normal               |  tbb-usability
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:                       |
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 The zh-CN manual is rnow available so we can link to it. Also I want to
 generate the manual link without relying on dtd files.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21574>
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