Allow a wider range of acceptable download times
```
# Limits on what download times are too fast/slow/etc.
download_toofast = 1
download_min = 5
download_target = 6
download_max = 10
```
We could use shorter download times, but we're trying to match torflow.
We could allow a wider range of acceptable times.
In particular, 5 and 6 are *very* close together.
Let's try at least a 4x range, and see if that helps?
```
download_min = 4
download_target = 8
download_max = 16
```
issue