Resolve unused function warnings when built w/o USE_MOSUITTO and USE_SYSTEMD

src/sbbs3/mqtt.c

@@ -358,6 +358,7 @@ void mqtt_close(struct mqtt* mqtt)
 	FREE_AND_NULL(mqtt->host);
 }
 
+#ifdef USE_MOSQUITTO
 static int pw_callback(char* buf, int size, int rwflag, void* userdata)
 {
 	struct mqtt* mqtt = (struct mqtt*)userdata;
@@ -365,6 +366,7 @@ static int pw_callback(char* buf, int size, int rwflag, void* userdata)
 	strncpy(buf, mqtt->cfg->mqtt.tls.keypass, size);
 	return strlen(mqtt->cfg->mqtt.tls.keypass);
 }
+#endif
 
 int mqtt_connect(struct mqtt* mqtt, const char* bind_address)
 {

src/sbbs3/sbbscon.c

@@ -224,6 +224,7 @@ static bool any_server_running()
 	return false;
 }
 
+#ifdef USE_SYSTEMD
 static bool any_server_with_state(enum server_state state)
 {
 	for(int i = 0; i < SERVER_COUNT; i++)
@@ -232,7 +233,6 @@ static bool any_server_with_state(enum server_state state)
 	return false;
 }
 
-#ifdef USE_SYSTEMD
 static void notify_systemd(const char* new_status)
 {
 	static char status[1024];