Centralized the creation of a hostname to a global variable hostname, set in pitrix.cpp. Added an mDNS record for the webserver.

src/http_server.cpp

@@ -4,6 +4,8 @@
 
 #include "http_server.h"
 #include "effects.h"
+#include "my_wifi.h"
+#include "prototypes.h"
 
 #if defined( ESP8266 )
 ESP8266WebServer http_server(HTTP_SERVER_PORT);
@@ -71,6 +73,8 @@ void http_server_setup() {
 		http_server.send_P(400, text_plain, PSTR("Unknown effect."));
 	});
 	http_server.begin();
+	
+	MDNS.addService("_http", "_tcp", 80);
 }
 
 void http_server_loop() {