Merge pull request #41947 from AkihiroSuda/rootless-kill-mode-mixed

rootless: prevent the service hanging when stopping (set systemd KillMode to mixed)

contrib/dockerd-rootless-setuptool.sh

@@ -307,6 +307,7 @@ install_systemd() {
 			TasksMax=infinity
 			Delegate=yes
 			Type=simple
+			KillMode=mixed
 
 			[Install]
 			WantedBy=default.target