If anyone is interested, this is how I install / upgrade adblock on my Turris Omnia:
opkg remove adblock --force-removal-of-dependent-packages
VER_ADB=3.4.3-1
VER_GIT=18.013.44459-84a63dd-1cd /tmp
wget -N https://downloads.lede-project.org/snapshots/packages/x86_64/packages/adblock_${VER_ADB}_all.ipk
wget -N https://downloads.lede-project.org/snapshots/packages/x86_64/luci/luci-app-adblock_git-${VER_GIT}_all.ipkopkg install adblock_${VER_ADB}_all.ipk --force-maintainer
opkg install luci-app-adblock_git-${VER_GIT}_all.ipkcat > /etc/adblock/adblock.whitelist << EOF
medscape.com
googleadservices.com
EOFuci set adblock.disconnect.enabled=‘0’
uci set adblock.hphosts.enabled=‘1’for IDX in cn de id nl pl ro ru; do
uci del adblock.reg_${IDX}
doneuci set adblock.global.adb_dns=‘kresd’
uci set adblock.global.adb_fetchutil=‘wget’
uci set adblock.global.adb_trigger=‘timed’
uci set adblock.global.adb_enabled=‘1’
uci commit/etc/init.d/adblock enable
/etc/init.d/adblock start