redirect: skip URL encoding for host names

[salshaaban]

This fixes redirects to IDN URLs

Bug: #1441
Reported by: David Lord

[mention-bot]

@salshaaban, thanks for your PR! By analyzing the history of the files in this pull request, we identified @bagder, @dfandrich and @yangtse to be potential reviewers.

[coveralls]

Coverage increased (+0.05%) to 75.125% when pulling 636a62b on salshaaban:IDN into 77cd4e7 on curl:master.

[bagder]

Thanks, I'm working on writing up a test for this. In fact, I already did but the problem now is that the test uses a hard-coded port number in the HTTP response header and that's not how we like to do things, so I need to come up with a solution to that ...

[salshaaban]

I'm working on writing up a test for this. In fact, I already did

I should've done that myself. Sorry!
I will try to think of something too.

[bagder]

check out test1448 (remove the .txt extension)

[bagder]

Aha! I figured it out. I can use --connect-to, to redirect that port 8990 to the port it is actually on! ... I'll post a separate PR to see what the CI says.

[bagder]

That's now in #1772

[bagder]

Thanks!