[dd-ctl] Fix installations without docker

When we improved the update process, we introduced a deadlock when not
having docker.

By separating update from repo-update we can differentiate those cases:
- update: full update of an existing installation
- repo-update: bring repository to latest stand

dd-ctl

@@ -157,16 +157,20 @@ ddupdate(){
 	# Bring down services
 	./dd-ctl down
 	# Switch to latest version
-	git fetch && git checkout $REPO_BRANCH
+	git fetch && git checkout "$REPO_BRANCH"
 	git pull --rebase --autostash
 	# Needed for dd-apps submodules...
 	git submodule update --init --recursive
+	case "${1}" in
+		--full)
 			# Rebuild containers
 			./dd-ctl build
 			# Upgrade plugins
 			./dd-ctl upgrade-plugins
 			# Reapply customisations if needed
 			./dd-ctl customize
+		;;
+	esac
 }
 
 build_compose(){
@@ -792,7 +796,10 @@ case "$OPERATION" in
 		prerequisites_docker
 		prerequisites_pwd
 	;;
-	update|repo-update)
+	update)
+		ddupdate --full
+	;;
+	repo-update)
 		ddupdate
 	;;
 	reset-data|reset-1714)