channel_select blocks until data received, despite timeout.

[libssh.20.awinder@xxxxxxxxxxxxxxx]

channel_select allows a timeout value to be specified. This timeout is 
used in the select() call, however is not honored because the code 
requires data to be available on the channel before channel_select returns.

channels.c, starting line 2196.

First, the channels are polled. If no data is received, the code goes on 
to block with select() using the given timeout. When select returnes, 
the code loops back around to check for data on one of the requested 
channels, and if there is none, continues on to the select() using the 
given timeout. When select returns, ....

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-Andrew
libssh.20.awinder@xxxxxxxxxxxxxxx