The FTP coprocess formerly wrote the output of the "get | tar vxf -" pipe
to stderr, which resulted in no output to the feedback pipe (stdout), and
thus the timeout was not updated for any line printed by the "tar" process.
This was now changed to also feed back the chars to the expect() routine,
updating the timeout handler. The "also" part is implemented by passing
the output through "tee /dev/stderr".
At least NetBSD and Solaris have this, so no problem there.
Thanks to Frank van der Linden for helping me to debug this.
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