check range of fetch-quota-param parameters

Evan Hunt requested to merge 362-check-fetch-quota-param into main

the 'low', 'high' and 'discount' parameters to 'fetch-quota-param' are meant to be ratios with values between zero and one, but higher values can be assigned. this could potentially lead to an assertion in maybe_adjust_quota().

Closes #362 (closed)

Merge request reports