This merge request aims to increase doth system test stability by:
- decreasing the HTTP listener quota size which, in turn, greatly reduces the global amount of open file descriptors of different kinds needed to run the tests in parallel in multiple containers. This way it is less likely to hit any global kernel limits, while testing all the required code paths.
- increasing transfer-in/out limits preventing the test from failing early during some runs.
Closes #3596 (closed).