dns-prefetch does not work when ports are specified

[adamgibbins]

How do you create the issue, and how reproducible is it? (show the full command)

% ./pewpew stress --dns-prefetch 'http://production-something-003.mgmt.pg.net.local:8000/blah'
Error: failed to create request with target configuration: failed to prefetch host production-something-003.mgmt.pg.net.local:8000
Usage:
  pewpew stress URL... [flags]

Yet works fine without --dns-prefetch

What version of pewpew are you running?

0.3.2

Did you compile pewpew yourself, or use a prebuilt version?

Prebuilt release from GitHub.