2.6.4 release todo list

[diecui1202]

1. fix retries to 2, #2162 #2303 Change consumer retries default value from 0 to 2. Need to change docs
2. Binding attachment before a clusterInvoker invoke. #2024 Fix the problem that attachment is lost when retry
3. fix subscription when enable monitor #2166 Add ip and application name for MonitorService
4. [Dubbo-2017]Fix redis auth problem for RedisProtocol(merge to 2.6.x PR) #2146 Support access Redis with password
5. support char[] for generic invoke #2003 #2137 Support char array for GenericService
6. New ascii logo for 2.6.x #2402 New ASCII logo for Dubbo
7. Direct return when the server goes down unnormally. #2451 Direct return when the server goes down abnormally
8. fix telnet invoke NPE #2218 (#2273) #2453 Fix NPE when telnet get a null parameter
9. Qos enhancement #2455 Add log when qos start failed
10. PojoUtil realize type convert not support subclasses of 'java.util.date' #2499 PojoUtil support subclasses of java.util.Date

[diecui1202]

@chickenlj

[diecui1202]

I've sorted out the issues relevant with 2.6.4 milestone, the candidates were labeled with status/fix-in-next-release.

https://github.com/apache/incubator-dubbo/labels/status%2Ffix-in-next-release

[carryxyh]

Hi, This pr mainly to fix the problem that attachment is lost when retry：
#2024
Maybe change to Fix the problem that attachment is lost when retry.

FolkInvokeCluster should be ForkingClusterInvoker.

Other fix options have been checked.

[diecui1202]

@carryxyh you can edit the list above directly.

[carryxyh]

@diecui1202
Has fixed it. :)