[tor-bugs] #6028 [Tor Relay]: errno_to_orconn_end_reason() spams log when errno == 0

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#6028: errno_to_orconn_end_reason() spams log when errno == 0
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 Reporter:  ln5        |          Owner:                    
     Type:  defect     |         Status:  new               
 Priority:  minor      |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Relay  |        Version:                    
 Keywords:             |         Parent:                    
   Points:             |   Actualpoints:                    
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Comment(by andrea):

 I think the only path out of connection_handle_read_impl() without setting
 *socket_error should also log_warn(LD_BUG, "apparently, reading pending
 bytes can fail.").  Since no such message was mentioned I'll assume this
 is not the case.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6028#comment:6>
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