Add websocket server and client, for use later

http-api/src/main/java/net/runelite/http/api/RuneliteAPI.java

@@ -36,6 +36,7 @@ public class RuneliteAPI
 	private static final Logger logger = LoggerFactory.getLogger(RuneliteAPI.class);
 
 	private static final String BASE = "https://api.runelite.net/runelite-";
+	private static final String WSBASE = "wss://api.runelite.net/runelite-";
 	private static final Properties properties = new Properties();
 	private static String version;
 	private static int rsVersion;
@@ -61,6 +62,11 @@ public class RuneliteAPI
 		return HttpUrl.parse(BASE + getVersion());
 	}
 
+	public static String getWsEndpoint()
+	{
+		return WSBASE + getVersion() + "/ws";
+	}
+
 	public static String getVersion()
 	{
 		return version;