Edward Hervey authored Nov 08, 2017 and Edward Hervey committed Nov 08, 2017

This is a regression introduced by "03db3741 - souphttpsrc: retry
request on early termination from the server"

The problem was that when seeking back to 0, we would not end up calling
add_range_header() which in addition to adding range headers *ALSO* sets
the read_position to the requested one.

This would result in a wide variety of later failures, like reading
again and again instead of stopping properly.