updated Java Spark to 2.8.0 (core tools 2.1.0) and fixed errors due to upgrade

Author: fquirin

pom.xml

@@ -80,7 +80,7 @@
         <dependency>
 	        <groupId>net.b07z.sepia.server.core</groupId>
 	        <artifactId>sepia-core-tools</artifactId>
-	        <version>2.0.2</version>
+	        <version>2.1.0</version>
 	    </dependency>
         <dependency>
             <groupId>com.j2html</groupId>

src/main/java/net/b07z/sepia/websockets/client/SocketClientHandler.java

@@ -1,6 +1,7 @@
 package net.b07z.sepia.websockets.client;
 import java.net.URI;
 
+import org.eclipse.jetty.client.HttpClient;
 import org.eclipse.jetty.util.ssl.SslContextFactory;
 import org.eclipse.jetty.websocket.client.ClientUpgradeRequest;
 import org.eclipse.jetty.websocket.client.WebSocketClient;
@@ -41,8 +42,9 @@ public SocketClientHandler(SocketClient socket){
 		if (SocketConfig.isSSL){													
 			SslContextFactory sslContextFactory = new SslContextFactory();
 		    sslContextFactory.setKeyStorePath("Xtensions/SSL/ssl-keystore.jks");
-		    sslContextFactory.setKeyStorePassword(SocketConfig.keystorePwd); 		
-		    client = new WebSocketClient(sslContextFactory);
+		    sslContextFactory.setKeyStorePassword(SocketConfig.keystorePwd);
+		    client = new WebSocketClient(new HttpClient(sslContextFactory));
+		    //replaced for sparkjava: client = new WebSocketClient(sslContextFactory);
 		}else{
 			client = new WebSocketClient();
 		}

src/main/java/net/b07z/sepia/websockets/server/StartWebSocketServer.java

@@ -135,10 +135,10 @@ public static void main(String[] args) {
         SocketServer server = new SepiaSocketHandler();
         AbstractSocketHandler.server = server;
 
-        webSocket("/messages", AbstractSocketHandler.class);
+        webSocket("/messages/", AbstractSocketHandler.class); 		//NOTE: it HAS TO end with "/"
         webSocketIdleTimeoutMillis(SocketConfig.IDLE_TIMEOUT);
-        
         //init(); //only needed when no REST end-points follow
+        
         get("/online", (request, response) -> 			CoreEndpoints.onlineCheck(request, response));
 		get("/ping", (request, response) -> 			CoreEndpoints.ping(request, response, SocketConfig.SERVERNAME));
 		get("/validate", (request, response) -> 		CoreEndpoints.validateServer(request, response,	SocketConfig.SERVERNAME,