* Add test for links to other markdown docs.

* Remove unused import.

### Motivation

Add support for partitioned topic consumer seek by time.

### Modifications

Call each partition consumer seekAsync() while call partitioned consumer seekAsync()

### Verifying this change

Update unit tests for consumer.seek().

Signed-off-by: Nxiaolong.ran <ranxiaolong716@gmail.com>

[Docs] Add functions-worker commands for pulsar admin CLI

* [pulsar-perf] Add batching max message into perf-producer

* add default values

Signed-off-by: Nxiaolong.ran <ranxiaolong716@gmail.com>

After compaction completes the compacted ledger is recorded as a
property of a cursor. As persisting the cursor is async and we don't
wait for the acknowledgement of the acknowledgement, there may be a
race if we try to read the compacted ledger immediately.

To avoid this race, I've added a 1 second sleep to allow the compacted
ledger to be updated on the broker.

* Make Function Authentication Provider pluaggable

* add config comments

* cleaning up

* cleaning up

* fix test

* [pulsar-broker] Fix: race condition : Failed to read-more entries on dispatcher

* clean up non-used method

* Update logo path for Pulsar users

* Fix logo background for HSL and One click retail

* Fix bug that namespace policies does not take effect due to NPE

* Prevent NPE if Dispatcher and DispatchRateLimiter return to null

* fix potential deadlock that can occur in addConsumer

* add fix to PersistentDispatcherSingleActiveConsumer

* fixing tests

Signed-off-by: KevenYLi <liyi.changde@gmail.com>

This reverts commit d49e61e0.

### Motivation

The `Send(context.Context, ProducerMessage) error` should return `MessageID`.

```
 SendAsync(context.Context, ProducerMessage, func(ProducerMessage, error))
```

fix full-width “” to half-width "

* Not allow use acknowledgeCumulative on Key_shared subscription.

* fix comments

* C++ Client add acknowledgeCumulative not allowed check.

* Add *Kinesis source connector guide*

* update

* Update

There's a bug in how user metadata is attached to a block that if the
user doesn't specify both the region and the endpoint, offloading will
throw an exception, as you can't add a null value to an immutable
map.

This change elides null to the empty string in these cases, so that
offloading can continue.

Master Issue: #5234

### Motivation

The other day, I fixed a memory leak caused by not being executed the destructor of C++ producer in #5246. However, when running a producer application written in Go in an environment with the modified C++ client library installed, the program occasionally crashes due to a "bad_weak_ptr" error.

```
2019/10/01 16:34:30.210 c_client.go:68: [info] INFO  | ProducerImpl:481 | [persistent://massakam/global/test/t1, dc1-904-1012912] Closing producer for topic persistent://massakam/global/test/t1
2019/10/01 16:34:30.211 c_client.go:68: [info] INFO  | ProducerImpl:463 | Producer - [persistent://massakam/global/test/t1, dc1-904-1012912] , [batchMessageContainer = { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 1000] [topicName = persistent://massakam/global/test/t1] [producerName_ = dc1-904-1012912] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 1] [averageBatchSize = 1]}]
2019/10/01 16:34:30.211 c_client.go:68: [info] INFO  | BatchMessageContainer:171 | [numberOfBatchesSent = 1] [averageBatchSize = 1]
terminate called after throwing an instance of 'std::bad_weak_ptr'
  what():  2019/10/01 16:34:30.211 c_client.go:68: [info] INFO  | ProducerImpl:463 | Producer - [persistent://massakam/global/test/t1, dc1-904-1012911] , [batchMessageContainer = { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 1000] [topicName = persistent://massakam/global/test/t1] [producerName_ = dc1-904-1012911] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 1] [averageBatchSize = 1]}]
bad_weak_ptr
2019/10/01 16:34:30.211 c_client.go:68: [info] INFO  | BatchMessageContainer:171 | [numberOfBatchesSent = 1] [averageBatchSize = 1]
2019/10/01 16:34:30.211 c_client.go:68: [info] INFO  | ProducerImpl:463 | Producer - [persistent://massakam/global/test/t1, dc1-904-1012910] , [batchMessageContainer = { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 1000] [topicName = persistent://massakam/global/test/t1] [producerName_ = dc1-904-1012910] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 1] [averageBatchSize = 1]}]
SIGABRT: abort
PC=0x7fc78d39d2c7 m=0 sigcode=18446744073709551610
```

As a result of the investigation, I found that the destructor was called before the process of closing `ProducerImpl` was completed, and the object was destroyed.

### Modifications

To keep the `ProducerImpl` object alive, get its own shared pointer at the beginning of `ProducerImpl::closeAsync()`. And the pointer must be passed to `ProducerImpl::handleClose()`. Otherwise, the object will be destroyed before `handleClose()` is called.

So far, this issue has not been reproduced in `ConsumerImpl`, but I fixed it in the same way as `ProducerImpl`.

[Docs] Add putstate, set-replicator-dispatch-rate and get-replicator-dispatch-rate cli docs for pulsar admin (#5338)
Signed-off-by: Nxiaolong.ran <ranxiaolong716@gmail.com>

### Motivation

In [pulsar-admin](https://pulsar.apache.org/docs/en/pulsar-admin), we have not listed the document information related to the `putstate`, `set-replicator-dispatch-rate` and `get-replicator-dispatch-rate`command.

### Modifications

*Describe the modifications you've done.*

Add `putstate` command for **pulsar-admin functions**.
Add `set-replicator-dispatch-rate` command for **pulsar-admin namespaces**.
Add `get-replicator-dispatch-rate` command for **pulsar-admin namespaces**.

* Add *HDFS2 sink connector guide*

* Update

* Update

### Motivation

If cursor is not durable, the subscription is closed and removed from the topic when all consumers are removed. 
https://github.com/apache/pulsar/blob/413ba03050036a620fa346456ef6c3ff6071e9ab/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentSubscription.java#L237-L254

As mentioned in #5288, the dispatcher also needs to be closed at this time. Otherwise, `RateLimiter` instances will not be garbage collected, causing a memory leak.

* Ensure the handling of PartitionMetadataRequest is async end-to-end

* Fixed z-node path

Signed-off-by: KevenYLi <liyi.changde@gmail.com>