[tor-bugs] #22342 [Core Tor/Tor]: Add a nice append-only stringbuffer, and refactor code to use it

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#22342: Add a nice append-only stringbuffer, and refactor code to use it
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 Reporter:  nickm         |          Owner:  nickm
     Type:  defect        |         Status:  accepted
 Priority:  Medium        |      Milestone:  Tor: 0.3.2.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by nickm):

 initial work in a branch `strbuf`. will some back to this later.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22342#comment:2>
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