Version links in release notes (apache#1721)

This enables people to easily link to release notes for specific versions. In the future, this page should be templated and built from source files rather than raw Markdown, but for now this provides an easy stopgap solution.

site/release-notes.md

@@ -26,7 +26,7 @@ layout: content
 
 ## Apache incubator
 
-### 1.22.0-incubating — 2018-03-06
+### 1.22.0-incubating &mdash; 2018-03-06 <a id="1.22.0-incubating"></a>
 
 This is the fourth of Apache Pulsar since entering the ASF incubator.
 
@@ -71,7 +71,7 @@ https://github.com/apache/incubator-pulsar/milestone/11?closed=1
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.22.0-incubating
 
-### 1.21.0-incubating &mdash; 2017-12-17
+### 1.21.0-incubating &mdash; 2017-12-17 <a id="1.21.0-incubating"></a>
 
 This is the third of Apache Pulsar since entering the ASF incubator.
 
@@ -93,7 +93,7 @@ https://github.com/apache/incubator-pulsar/milestone/10?closed=1
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.21.0-incubating
 
-### 1.20.0-incubating &mdash; 2017-08-08
+### 1.20.0-incubating &mdash; 2017-08-08 <a id="1.20.0-incubating"></a>
 
 This is the second of Apache Pulsar since entering the ASF incubator.
 
@@ -111,7 +111,7 @@ https://github.com/apache/incubator-pulsar/milestone/9?closed=1
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.20.0-incubating
 
-### 1.19.0-incubating &mdash; 2017-08-08
+### 1.19.0-incubating &mdash; 2017-08-08 <a id="1.19.0-incubating"></a>
 
 This is the first of Apache Pulsar since entering the ASF incubator.
 
@@ -131,7 +131,7 @@ https://github.com/apache/incubator-pulsar/releases/tag/v1.19.0-incubating
 
 ## Pre-Apache
 
-### 1.18 &mdash; 2017-06-17
+### 1.18 &mdash; 2017-06-17 <a id="1.18"></a>
 
 Main changes:
  * [#325](https://github.com/apache/incubator-pulsar/pull/325) Add Modular load manager documentation
@@ -172,7 +172,7 @@ Full list of changes: https://github.com/yahoo/pulsar/milestone/7?closed=1
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.18
 
-### 1.17.5 &mdash; 2017-05-02
+### 1.17.5 &mdash; 2017-05-02 <a id="1.17.5"></a>
 
  * [#343](https://github.com/apache/incubator-pulsar/pull/343) Fix ModularLoadManager to select broker from current available-broker list
  * [#384](https://github.com/apache/incubator-pulsar/pull/384) Fix Send replay entries read callback from background thread, to avoid recursive stack calls
@@ -181,35 +181,35 @@ https://github.com/apache/incubator-pulsar/releases/tag/v1.18
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17.5
 
-### 1.17.4 &mdash; 2017-04-25
+### 1.17.4 &mdash; 2017-04-25 <a id="1.17.4"></a>
 
  * [#362](https://github.com/apache/incubator-pulsar/pull/362) Fix add timeout on blocking ZookeeperCache get call
  * [#375](https://github.com/apache/incubator-pulsar/pull/375) Fix possible deal lock on topic loading if broker fails to get MLConfiguration from zk
  * [#377](https://github.com/apache/incubator-pulsar/pull/377) Fix zkCache error handling and zk-callback processing on separate dedicated thread
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17.4
 
-### 1.17.3 &mdash; 2017-04-20
+### 1.17.3 &mdash; 2017-04-20 <a id="1.17.3"></a>
 
  * [#367](https://github.com/apache/incubator-pulsar/pull/367) Fix dispatcher correctly finds available consumer from list of shared-subscription consumers
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17.3
 
-### 1.17.2 &mdash; 2017-04-06
+### 1.17.2 &mdash; 2017-04-06 <a id="1.17.2"></a>
 
  * [#327](https://github.com/apache/incubator-pulsar/pull/327) Create znode for dynamic configuration if not present
  * [#336](https://github.com/apache/incubator-pulsar/pull/336) Fix prevent creation of topic when bundle is disable
  * [#338](https://github.com/apache/incubator-pulsar/pull/338) Fix deserialize load report based on load-manager
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17.2
 
-### 1.17.1 &mdash; 2017-03-30
+### 1.17.1 &mdash; 2017-03-30 <a id="1.17.1"></a>
 
  * [#326](https://github.com/apache/incubator-pulsar/pull/326) Fix memory leak while duplicating entry data from existing entry
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17.1
 
-### 1.17 &mdash; 2017-03-30
+### 1.17 &mdash; 2017-03-30 <a id="1.17"></a>
 
 Main changes:
 
@@ -239,33 +239,33 @@ Full list of changes: https://github.com/apache/incubator-pulsar/milestone/3?clo
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.17
 
-### 1.16.5 &mdash; 2017-03-10
+### 1.16.5 &mdash; 2017-03-10 <a id="1.16.5"></a>
 
  * [#311](https://github.com/apache/incubator-pulsar/pull/311) Exclude netty individual jars from binary distribution. This issue was causing binary distribution to have conflicting netty dependencies.
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16.5
 
-### 1.16.4 &mdash; 2017-03-10
+### 1.16.4 &mdash; 2017-03-10 <a id="1.16.4"></a>
 
  * [#265](https://github.com/apache/incubator-pulsar/pull/265) Fix client closes http-connection on internal-server error
  * [#283](https://github.com/apache/incubator-pulsar/pull/283) Fix recycle keep alive command-object properly
  * [#284](https://github.com/apache/incubator-pulsar/pull/284) Reduce usage of collections in managed-ledger metrics-generation to reduce GC impact
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16.4
 
-### 1.16.3 &mdash; 2017-03-01
+### 1.16.3 &mdash; 2017-03-01 <a id="1.16.3"></a>
 
  * [#275](https://github.com/apache/incubator-pulsar/pull/275) Fix for Infinite loop in PersistentReplicator.startProducer()
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16.3
 
-### 1.16.2 &mdash; 2017-02-24
+### 1.16.2 &mdash; 2017-02-24 <a id="1.16.2"></a>
 
  * [#250](https://github.com/apache/incubator-pulsar/pull/250) : Disconnect consumers without closing dispatcher on cursor-reset
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16.2
 
-### 1.16.1 &mdash; 2017-02-24
+### 1.16.1 &mdash; 2017-02-24 <a id="1.16.1"></a>
 
  * [#221](https://github.com/apache/incubator-pulsar/pull/221) Fixed race condition while creating client connection
  * [#223](https://github.com/apache/incubator-pulsar/pull/223) Fixed broker's direct memory usage count
@@ -274,7 +274,7 @@ https://github.com/apache/incubator-pulsar/releases/tag/v1.16.2
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16.1
 
-### 1.16 &mdash; 2017-02-02
+### 1.16 &mdash; 2017-02-02 <a id="1.16"></a>
 
 Main changes:
  * [#76](https://github.com/apache/incubator-pulsar/pull/76) Async Zookeeper cache implementation
@@ -296,51 +296,51 @@ Full list of changes: https://github.com/yahoo/pulsar/milestone/2?closed=1
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.16
 
-### 1.15.7 &mdash; 2017-01-25
+### 1.15.7 &mdash; 2017-01-25 <a id="1.15.7"></a>
 
  * [#174](https://github.com/apache/incubator-pulsar/pull/174) Handling bundle unloading failure
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.7
 
-### 1.15.6 &mdash; 2017-01-20
+### 1.15.6 &mdash; 2017-01-20 <a id="1.15.6"></a>
 
  * [#171](https://github.com/apache/incubator-pulsar/pull/171) Fix: Consumer redelivery should not wipeout availablePermits
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.6
 
-### 1.15.5 &mdash; 2017-01-03
+### 1.15.5 &mdash; 2017-01-03 <a id="1.15.5"></a>
 
  * [#159](https://github.com/apache/incubator-pulsar/pull/159) Fix: Replicator-cleanup while closing replicator at broker.
  * [#160](https://github.com/apache/incubator-pulsar/pull/160) Fix: Http lookup for topic with special character
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.5
 
-### 1.15.4 &mdash; 2016-12-14
+### 1.15.4 &mdash; 2016-12-14 <a id="1.15.4"></a>
 
  * [#146](https://github.com/apache/incubator-pulsar/pull/146) Fix: Partitioned consumer can consume messages with receiverQueueSize 1.
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.4
 
-### 1.15.3 &mdash; 2016-12-13
+### 1.15.3 &mdash; 2016-12-13 <a id="1.15.3"></a>
 
  * [#145](https://github.com/apache/incubator-pulsar/pull/145) Fixed issue Partitioned-consumer aggregate messages without blocking internal listener thread
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.3
 
-### 1.15.2 &mdash; 2016-11-03
+### 1.15.2 &mdash; 2016-11-03 <a id="1.15.2"></a>
 
  * [#102](https://github.com/apache/incubator-pulsar/pull/102) Fixed issue with message dispatching while message-replay at broker
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.2
 
-### 1.15.1 &mdash; 2016-10-27
+### 1.15.1 &mdash; 2016-10-27 <a id="1.15.1"></a>
 
  * [#89](https://github.com/apache/incubator-pulsar/pull/89) Fixed issue with replication in a mixed
    environment with 1.14 and 1.15 brokers
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15.1
 
-### 1.15 &mdash; 2016-10-18
+### 1.15 &mdash; 2016-10-18 <a id="1.15"></a>
 
 - [#39](https://github.com/apache/incubator-pulsar/pull/39) Updated BookKeeper version to 4.3.1.41-yahoo to include bookie storage improvements
 - [#17](https://github.com/apache/incubator-pulsar/pull/17) Fixed memory leak in stats generation buffer rollover
@@ -356,7 +356,7 @@ Full list of changes: https://github.com/apache/incubator-pulsar/milestone/1?clo
 
 https://github.com/apache/incubator-pulsar/releases/tag/v1.15
 
-### 1.14 &mdash; 2016-08-31
+### 1.14 &mdash; 2016-08-31 <a id="1.14"></a>
 
 First public release of Pulsar