Teltonika RUT240 MQTT broker, make CA certificate optional

2-mosquitto_optional_ca_cert.patch

diff -Naur a/package/mosquitto/files/mosquitto.init b/package/mosquitto/files/mosquitto.init
--- a/package/mosquitto/files/mosquitto.init	2021-01-22 12:43:31.616946844 +0200
+++ b/package/mosquitto/files/mosquitto.init	2021-01-22 12:35:17.360997419 +0200
@@ -75,7 +75,12 @@
 
 	# Use TLS/SSL for connection
 	if [ "$use_tls_ssl" == "1" ]; then
-		echo "cafile $ca_file" >> $CONFIG
+		if [ -n "$ca_file" ]
+                then
+			echo "cafile $ca_file" >> $CONFIG
+		else
+			echo "cafile /etc/cacert.pem" >> $CONFIG
+		fi
 		echo "certfile $cert_file" >> $CONFIG
 		echo "keyfile $key_file" >> $CONFIG
 
@@ -110,7 +115,12 @@
 
 		# Use TLS/SSL for bridge connection
 		if [ "$use_remote_tls" == "1" ]; then
-			echo "bridge_cafile $bridge_ca_file" >> $CONFIG
+			if [ -n "$bridge_ca_file" ]
+                        then
+				echo "bridge_cafile $bridge_ca_file" >> $CONFIG
+			else
+				echo "bridge_cafile /etc/cacert.pem" >> $CONFIG
+			fi
 			if [ -n "$bridge_cert_file" ]
 			then
 				echo "bridge_certfile $bridge_cert_file" >> $CONFIG
diff -Naur a/package/mosquitto/files/mosquitto_old.init b/package/mosquitto/files/mosquitto_old.init
--- a/package/mosquitto/files/mosquitto_old.init	2021-01-22 12:43:31.616946844 +0200
+++ b/package/mosquitto/files/mosquitto_old.init	2021-01-22 12:46:23.900939692 +0200
@@ -66,7 +66,12 @@
 		
 		# Use TLS/SSL for bridge connection
 		if [ "$use_remote_tls" == "1" ]; then
-			echo "bridge_cafile $bridge_ca_file" >> $CONFIG
+			if [ -n "$bridge_ca_file" ]
+			then
+				echo "bridge_cafile $bridge_ca_file" >> $CONFIG
+			else
+ 				echo "bridge_cafile /etc/cacert.pem" >> $CONFIG
+			fi
 			if [ -n "$bridge_cert_file" ]
 			then
 				echo "bridge_certfile $bridge_cert_file" >> $CONFIG
@@ -97,7 +102,12 @@
 	
 	# Use TLS/SSL for connection
 	if [ "$use_tls_ssl" == "1" ]; then
-		echo "cafile $ca_file" >> $CONFIG
+		if [ -n "$ca_file" ]
+		then
+			echo "cafile $ca_file" >> $CONFIG
+		else
+ 			echo "cafile /etc/cacert.pem" >> $CONFIG
+		fi
 		echo "certfile $cert_file" >> $CONFIG
 		echo "keyfile $key_file" >> $CONFIG
 	fi