Fixes issue #1: two PKGBUILD files had wrong repo URL after repo rename.
packages/antergos-next-desktop-settings/PKGBUILD line 8
packages/antergos-next-mirrorlist/PKGBUILD line 8
CI: packages go into repo/antergos-pkgs/os/x86_64/ (standard layout),
then flat copies are made at repo/ root for backward compat.
Mirrorlist now has both Server lines, tried in order by pacman.