FS#4119 - ring.gr.jp kernel mirror has an unexpected folder structure, so downloads fail

[openwrt-bot]

paper42:

For example the btrfs-progs package from the packages feed:

PKG_SOURCE:=$(PKG_NAME)-v$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=@KERNEL/linux/kernel/people/kdave/btrfs-progs

according to this rule in scripts/download.pl:

push @mirrors, "http://www.ring.gr.jp/archives/linux/kernel.org/$dir";

it gets modified to

http://www.ring.gr.jp/archives/linux/kernel.org/linux/kernel/people/kdave/btrfs-progs/btrfs-progs-v5.14.2.tar.xz

but it should be:

http://www.ring.gr.jp/archives/linux/kernel.org/kernel/people/kdave/btrfs-progs/btrfs-progs-v5.14.2.tar.xz

(without /linux) All other mirrors succeed in downloading the file, so we should either strip /linux from start of $dir for this mirror or just remove it.