[tor-bugs] #4668 [Tor Relay]: Restore or rewrite renegotiation-limiting code

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#4668: Restore or rewrite renegotiation-limiting code
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 Reporter:  nickm        |          Owner:                    
     Type:  enhancement  |         Status:  new               
 Priority:  normal       |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor Relay    |        Version:                    
 Keywords:               |         Parent:                    
   Points:               |   Actualpoints:                    
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 In the 0.2.3 branch, we had some code to try to limit the number of
 renegotiations that could happen on a TLS connection (#4312).  This turned
 out to have a bunch of subtle bugs, so we reverted if (#4662).  We should
 re-do it as part of a general resource-limitation strategy in a later Tor.

 The code as it stood is now in a branch called "reapply_4312" in my public
 repository.  It contains cherry-picked versions of everything we reverted
 in #4662, plus the cherry-picked contents of George's
 "bug4626_callback_conditions_theory" branch.

 Please assign tickets that got created because of bugs in the 4312
 renegotiation code as children of this ticket.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4668>
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