GUAC-442: Add JSR 356 implementation of WebSocket tunnel.

guacamole/pom.xml

@@ -98,6 +98,14 @@
             <scope>provided</scope>
         </dependency>
 
+        <!-- JSR 356 WebSocket API -->
+        <dependency>
+            <groupId>javax.websocket</groupId>
+            <artifactId>javax.websocket-api</artifactId>
+            <version>1.0</version>
+            <scope>provided</scope>
+        </dependency>
+
         <!-- SLF4J - logging -->
         <dependency>
             <groupId>org.slf4j</groupId>