Try to use real docker socket on Mac

setup/scripts/l3d

@@ -17,7 +17,7 @@ case "${L3DHOSTOS}" in
       else
         # This works on MacOS when coreutils is installed.
         SCRIPTPATH="$(dirname "$(greadlink -f "$0")")"
-        DOCKERSOCKHOST="$(dirname "$(greadlink -f "/var/run/docker.sock")")"
+        DOCKERSOCKHOST="$(dirname "$(greadlink -f "/var/run/docker.sock")")/docker.sock"
       fi
       # Write a fake passwd file which will later be mounted into containers.
       echo "${USERNAME}:x:${USERID}:${GROUPID}:${USERNAME},,,:/home/${USERNAME}:${L3DSHELL}" >${HOME}/.passwd