mqtt port config changes

1. update example shairport-sync.conf file
2. update config file mqtt port parsing

Signed-off-by: David Crook <idcrook@users.noreply.github.com>

scripts/shairport-sync.conf

@@ -31,7 +31,7 @@ general =
 //	volume_control_profile = "standard" ; // use this advanced setting to specify how the airplay volume is transferred to the mixer volume.
 //		"standard" makes the volume change more quickly at lower volumes and slower at higher volumes.
 //		"flat" makes the volume change at the same rate at all volumes.
-//	volume_range_combined_hardware_priority = "no"; // when extending the volume range by combining the built-in software attenuator with the hardware mixer attenuator, set this to "yes" to reduce volume by using the hardware mixer first, then the built-in software attenuator. 
+//	volume_range_combined_hardware_priority = "no"; // when extending the volume range by combining the built-in software attenuator with the hardware mixer attenuator, set this to "yes" to reduce volume by using the hardware mixer first, then the built-in software attenuator.
 //	run_this_when_volume_is_set = "/full/path/to/application/and/args"; //	Run the specified application whenever the volume control is set or changed.
 //		The desired AirPlay volume is appended to the end of the command line – leave a space if you want it treated as an extra argument.
 //		AirPlay volume goes from 0 to -30 and -144 means "mute".
@@ -199,7 +199,7 @@ mqtt =
 {
 //	enabled = "no"; // set this to yes to enable the mqtt-metadata-service
 //	hostname = "iot.eclipse.org"; // Hostname of the MQTT Broker
-//	port = "1883";
+//	port = 1883; // Port on the MQTT Broker to connect to
 //	username = NULL; //set this to a string with your username, to enable username authentication
 //	password = NULL; //set this to a string with your password, to enable username & password authentication
 //	capath = NULL; //set this to the folder with the CA-Certificates to be accepted for the server certificate. If not set, TLS is not used