GUACAMOLE-422: Add timezone instruction to handshake, remove kludge from JDBC module.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/tunnel/AbstractGuacamoleTunnelService.java

@@ -476,15 +476,6 @@ public abstract class AbstractGuacamoleTunnelService implements GuacamoleTunnelS
                 activeConnections.put(connection.getIdentifier(), activeConnection);
                 activeConnectionGroups.put(connection.getParentIdentifier(), activeConnection);
                 config = getGuacamoleConfiguration(activeConnection.getUser(), connection);
-                
-                // If timezone is provided by tunnel parameter, and not
-                // overriden by connection parameter, set it.
-                String tzTunnel = info.getTimezone();
-                String tzParam = config.getParameter("timezone");
-                if ((tzParam == null || tzParam.isEmpty())
-                        && tzTunnel != null && !tzTunnel.isEmpty())
-                    config.setParameter("timezone", tzTunnel);
-                
             }
 
             // If we ARE joining an active connection, generate a configuration

guacamole-common/src/main/java/org/apache/guacamole/protocol/ConfiguredGuacamoleSocket.java

@@ -184,6 +184,13 @@ public class ConfiguredGuacamoleSocket implements GuacamoleSocket {
                     "image",
                     info.getImageMimetypes().toArray(new String[0])
                 ));
+        
+        // Send client timezone
+        writer.writeInstruction(
+                new GuacamoleInstruction(
+                    "timezone",
+                    info.getTimezone()
+                ));
 
         // Send args
         writer.writeInstruction(new GuacamoleInstruction("connect", arg_values));