Make it clear to users that they should not place a custom file
in /etc/sysctl.d/ for their values and expect it to survive a
reimage.
This change is needed since these directories (/etc/foo.d/) are
generally where such files are placed on other distros.
Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/16543
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
664b8ffb0a