scripts/download.pl: fix support for aria2c download tool on macos

Currently we use /dev/shm to place aria2c tmp file. This is not present
on macos. Use the openwrt tmp directory instead of the linux-only
/dev/shm to save compatibility with more os.

Fixes: d391236 ("download.pl: add aria2c support")
Signed-off-by: Christian Marangi <[email protected]>

rockchip: fix rk3399 pppoe error in kernel 5.18

kernel: bump 5.15 to 5.15.38 (coolsnowwolf#9378)

Signed-off-by: aakkll <[email protected]>

luci-app-qbittorrent: tidy up code (coolsnowwolf#8194)

Version Update to R20.9.15

luci-app-ssr-plus: OpenWrt SNAPSHOT compatibility (coolsnowwolf#4154)

* luci-app-ssr-plus: OpenWrt SNAPSHOT compatibility

Fix coolsnowwolf#4143

* Modify getElementById to getElementsByName

Luci modification for OpenWrt 19.07 or higher