Deprecate UMASK_SET in favor of UMASK in baseimage

root/etc/services.d/radarr/run

@@ -1,7 +1,9 @@
 #!/usr/bin/with-contenv bash
 
-UMASK_SET=${UMASK_SET:-022}
-umask "$UMASK_SET"
+if [ -n "${UMASK_SET}" ] && [ -z "${UMASK}" ]; then
+  echo -e "You are using a legacy method of defining umask\nplease update your environment variable from UMASK_SET to UMASK\nto keep the functionality after July 2021"
+  umask ${UMASK_SET}
+fi
 
 exec \
 	s6-setuidgid abc /app/radarr/bin/Radarr \