wget2 | Redirect/mirror regression since 400713ca (#698)

[luk1337 (@luk1337)]

luk1337 created an issue: https://gitlab.com/gnuwget/wget2/-/issues/698



When downloading a file with link + location headers, I expect it to be 
downloaded once, not twice. However, since Fedora backported 400713ca 
(https://src.fedoraproject.org/rpms/wget2/c/ed66a50ca2d6407c7b82e4bd3369938ce3a96a24),
 the following regression is now present:

```
$ curl -I 
https://mirrorbits.lineageos.org/tools/copy-partitions-20220613-signed.zip
HTTP/1.1 302 Found
Server: nginx/1.18.0 (Ubuntu)
Date: Thu, 05 Jun 2025 19:16:54 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Cache-Control: private, no-cache
Link: 
<https://lineageos.mirror.karneval.cz/tools/copy-partitions-20220613-signed.zip>;
 rel=duplicate; pri=1; geo=cz
Link: <https://ftp.fau.de/lineageos/tools/copy-partitions-20220613-signed.zip>; 
rel=duplicate; pri=2; geo=de
Link: 
<https://mirror.accum.se/mirror/lineageos/tools/copy-partitions-20220613-signed.zip>;
 rel=duplicate; pri=3; geo=se
Location: 
https://mirrors.dotsrc.org/lineageos/tools/copy-partitions-20220613-signed.zip
$ wget 
https://mirrorbits.lineageos.org/tools/copy-partitions-20220613-signed.zip
HTTP response 302 Found 
[https://mirrorbits.lineageos.org/tools/copy-partitions-20220613-signed.zip]
Adding URL: 
https://ftp.fau.de/lineageos/tools/copy-partitions-20220613-signed.zip
Adding URL: 
https://mirrors.dotsrc.org/lineageos/tools/copy-partitions-20220613-signed.zip
Saving 'copy-partitions-20220613-signed.zip'
HTTP response 200 OK 
[https://ftp.fau.de/lineageos/tools/copy-partitions-20220613-signed.zip]
Saving 'copy-partitions-20220613-signed.zip.1'
HTTP response 200  
[https://mirrors.dotsrc.org/lineageos/tools/copy-partitions-20220613-signed.zip]
copy-partitions-2022 100% 
[==================================================================>]    3.94K  
  --.-KB/s

                          [Files: 2  Bytes: 7.89K [10.79KB/s] Redirects: 1  
Todo: 0  Errors: 0]
$ ls
copy-partitions-20220613-signed.zip  copy-partitions-20220613-signed.zip.1
$ 
```

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