Omit HTTP mirrors that also support HTTPS
<!--
Warning: Do not ignore this template!
Failure to provide the required information risks automatic closure.
Please read our Bug reporting guidelines before opening a bug:
https://wiki.archlinux.org/title/Bug_reporting_guidelines
If you want to help catching more bugs upfront, consider joining the Arch Testing Team:
https://wiki.archlinux.org/title/Arch_Testing_Team
-->
# Description:
<!-- Describe the bug in full detail. -->
Many mirrors support both HTTP and HTTPS, so both are included in the mirrorlist. E.g.:
```
#Server = http://mirror.rackspace.com/archlinux/$repo/os/$arch
#Server = https://mirror.rackspace.com/archlinux/$repo/os/$arch
```
There is no reason to not use HTTPS when it is available, so, IMO, there is no reason to list HTTP mirrors if they also support HTTPS.
# Additional info:
<!-- The exact package version is compulsory. -->
* package version(s): pacman-mirrorlist 20251021-1
* config and/or log files:
* link to upstream bug report, if any:
# Steps to reproduce:
<!-- Describe how to reproduce the bug step by step including the commands -->
1. `cat /etc/pacman.d/mirrorlist`
issue