routing: add all changes of branch openwrt-19.07 till end of August 2020

017d89d batctl: Enable build of mcast_flags subcommand
ad8f02a opennds: Backport v5.2.0
0e5c75f Merge pull request #601 from bluewavenet/openwrt-19.07
6dea537 batman-adv: Merge bugfixes from 2020.3
b77498b Merge pull request #603 from ecsv/batadv-for-19.07

modules

@@ -15,7 +15,7 @@ PACKAGES_FREIFUNK_COMMIT=73454e6fe1bdc902c69ca0079d979fdb94d6fb1f
 PACKAGES_FREIFUNK_BRANCH=openwrt-19.07
 
 PACKAGES_ROUTING_REPO=https://github.com/openwrt-routing/packages.git
-PACKAGES_ROUTING_COMMIT=ad79a0f065a2096758b666dfe5e6b5926be2d166
+PACKAGES_ROUTING_COMMIT=b77498bd56d5e45ab4577a1f4ad6ffc55b4a86b7
 PACKAGES_ROUTING_BRANCH=openwrt-19.07
 
 PACKAGES_PACKAGES_BERLIN_REPO=https://github.com/freifunk-berlin/firmware-packages.git