Fix matrix-remove-all for when Synapse workers are enabled

roles/matrix-base/templates/usr-local-bin/matrix-remove-all.j2

@@ -15,11 +15,26 @@ if [ "$sure" != "Yes, I really want to remove everything!" ]; then
 	exit 0
 else
 	echo "Stop and remove matrix services"
-	for s in $(find {{ matrix_systemd_path }}/ -name "matrix-*" -printf "%f\n"); do
+
+	# Look for and stop services, avoiding things like
+	# 'matrix-synapse-worker@.service' (just a template for instantiated services; can't stop it directly).
+	# We use '-xtype f' and not '-type f', because we wish to match symlinks like this:
+	# '/etc/systemd/system/matrix-synapse.service.wants/matrix-synapse-worker@generic_worker:18111.service'
+	# and stop these instantiated services as well.
+	for s in $(find {{ matrix_systemd_path }}/ -xtype f -name "matrix-*" -printf "%f\n" | grep -v '@.service' | uniq); do
 		systemctl stop $s
+	done
+
+	# Get rid of regular service files, as well as symlinks like
+	# '/etc/systemd/system/matrix-synapse.service.wants/matrix-synapse-worker@generic_worker:18111.service'
+	# and even
+	# '/etc/systemd/system/multi-user.target.wants/matrix-synapse.service'.
+	for s in $(find {{ matrix_systemd_path }}/ -xtype f -name "matrix-*" -printf "%p\n"); do
 		rm -f {{ matrix_systemd_path }}/$s
 	done
+
 	systemctl daemon-reload
+
 	echo "Remove matrix scripts"
 	find {{ matrix_local_bin_path }}/ -name "matrix-*" -delete
 	echo "Remove unused Docker images and resources"