http/tests/resources/network-simulator.py has some useful functionality, but has some typos and missing features.
<rdar://problem/121642038>
Pull request: https://github.com/WebKit/WebKit/pull/23291
Committed 273607@main (b720c5d85f45): <https://commits.webkit.org/273607@main> Reviewed commits have been landed. Closing PR #23291 and removing active labels.