doc: add `added:` information for cluster

Ref: https://github.com/nodejs/node/issues/6578
PR-URL: https://github.com/nodejs/node/pull/7640
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

doc/api/cluster.md

@@ -108,12 +108,18 @@ responsibility to manage the worker pool for your application's needs.
 
 
 ## Class: Worker
+<!-- YAML
+added: v0.7.0
+-->
 
 A Worker object contains all public information and method about a worker.
 In the master it can be obtained using `cluster.workers`. In a worker
 it can be obtained using `cluster.worker`.
 
 ### Event: 'disconnect'
+<!-- YAML
+added: v0.7.7
+-->
 
 Similar to the `cluster.on('disconnect')` event, but specific to this worker.
 
@@ -124,12 +130,18 @@ cluster.fork().on('disconnect', () => {
 ```
 
 ### Event: 'error'
+<!-- YAML
+added: v0.7.3
+-->
 
 This event is the same as the one provided by [`child_process.fork()`][].
 
 In a worker you can also use `process.on('error')`.
 
 ### Event: 'exit'
+<!-- YAML
+added: v0.11.2
+-->
 
 * `code` {Number} the exit code, if it exited normally.
 * `signal` {String} the name of the signal (eg. `'SIGHUP'`) that caused
@@ -151,6 +163,9 @@ worker.on('exit', (code, signal) => {
 ```
 
 ### Event: 'listening'
+<!-- YAML
+added: v0.7.0
+-->
 
 * `address` {Object}
 
@@ -165,6 +180,9 @@ cluster.fork().on('listening', (address) => {
 It is not emitted in the worker.
 
 ### Event: 'message'
+<!-- YAML
+added: v0.7.0
+-->
 
 * `message` {Object}
 * `handle` {undefined|Object}
@@ -220,6 +238,9 @@ if (cluster.isMaster) {
 ```
 
 ### Event: 'online'
+<!-- YAML
+added: v0.7.0
+-->
 
 Similar to the `cluster.on('online')` event, but specific to this worker.
 
@@ -232,6 +253,9 @@ cluster.fork().on('online', () => {
 It is not emitted in the worker.
 
 ### worker.disconnect()
+<!-- YAML
+added: v0.7.7
+-->
 
 In a worker, this function will close all servers, wait for the `'close'` event on
 those servers, and then disconnect the IPC channel.
@@ -293,6 +317,9 @@ if (cluster.isMaster) {
 ```
 
 ### worker.exitedAfterDisconnect
+<!-- YAML
+added: v6.0.0
+-->
 
 * {Boolean}
 
@@ -314,6 +341,9 @@ worker.kill();
 ```
 
 ### worker.id
+<!-- YAML
+added: v0.8.0
+-->
 
 * {Number}
 
@@ -324,17 +354,26 @@ While a worker is alive, this is the key that indexes it in
 cluster.workers
 
 ### worker.isConnected()
+<!-- YAML
+added: v0.11.14
+-->
 
 This function returns `true` if the worker is connected to its master via its IPC
 channel, `false` otherwise. A worker is connected to its master after it's been
 created. It is disconnected after the `'disconnect'` event is emitted.
 
 ### worker.isDead()
+<!-- YAML
+added: v0.11.14
+-->
 
 This function returns `true` if the worker's process has terminated (either
 because of exiting or being signaled). Otherwise, it returns `false`.
 
 ### worker.kill([signal='SIGTERM'])
+<!-- YAML
+added: v0.9.12
+-->
 
 * `signal` {String} Name of the kill signal to send to the worker
   process.
@@ -351,6 +390,9 @@ Note that in a worker, `process.kill()` exists, but it is not this function,
 it is [`kill`][].
 
 ### worker.process
+<!-- YAML
+added: v0.7.0
+-->
 
 * {ChildProcess}
 
@@ -365,6 +407,9 @@ on `process` and `.exitedAfterDisconnect` is not `true`. This protects against
 accidental disconnection.
 
 ### worker.send(message[, sendHandle][, callback])
+<!-- YAML
+added: v0.7.0
+-->
 
 * `message` {Object}
 * `sendHandle` {Handle}
@@ -394,6 +439,10 @@ if (cluster.isMaster) {
 ```
 
 ### worker.suicide
+<!-- YAML
+added: v0.7.0
+deprecated: v6.0.0
+-->
 
 > Stability: 0 - Deprecated: Use [`worker.exitedAfterDisconnect`][] instead.
 
@@ -420,6 +469,9 @@ This API only exists for backwards compatibility and will be removed in the
 future.
 
 ## Event: 'disconnect'
+<!-- YAML
+added: v0.7.9
+-->
 
 * `worker` {cluster.Worker}
 
@@ -438,6 +490,9 @@ cluster.on('disconnect', (worker) => {
 ```
 
 ## Event: 'exit'
+<!-- YAML
+added: v0.7.9
+-->
 
 * `worker` {cluster.Worker}
 * `code` {Number} the exit code, if it exited normally.
@@ -459,6 +514,9 @@ cluster.on('exit', (worker, code, signal) => {
 See [child_process event: 'exit'][].
 
 ## Event: 'fork'
+<!-- YAML
+added: v0.7.0
+-->
 
 * `worker` {cluster.Worker}
 
@@ -484,6 +542,9 @@ cluster.on('exit', (worker, code, signal) => {
 ```
 
 ## Event: 'listening'
+<!-- YAML
+added: v0.7.0
+-->
 
 * `worker` {cluster.Worker}
 * `address` {Object}
@@ -538,6 +599,9 @@ cluster.on('message', function(worker, message, handle) {
 ```
 
 ## Event: 'online'
+<!-- YAML
+added: v0.7.0
+-->
 
 * `worker` {cluster.Worker}
 
@@ -553,6 +617,9 @@ cluster.on('online', (worker) => {
 ```
 
 ## Event: 'setup'
+<!-- YAML
+added: v0.7.1
+-->
 
 * `settings` {Object}
 
@@ -565,6 +632,9 @@ The `settings` object is the `cluster.settings` object at the time
 If accuracy is important, use `cluster.settings`.
 
 ## cluster.disconnect([callback])
+<!-- YAML
+added: v0.7.7
+-->
 
 * `callback` {Function} called when all workers are disconnected and handles are
   closed
@@ -579,6 +649,9 @@ The method takes an optional callback argument which will be called when finishe
 This can only be called from the master process.
 
 ## cluster.fork([env])
+<!-- YAML
+added: v0.6.0
+-->
 
 * `env` {Object} Key/value pairs to add to worker process environment.
 * return {cluster.Worker}
@@ -588,6 +661,9 @@ Spawn a new worker process.
 This can only be called from the master process.
 
 ## cluster.isMaster
+<!-- YAML
+added: v0.8.1
+-->
 
 * {Boolean}
 
@@ -596,12 +672,18 @@ by the `process.env.NODE_UNIQUE_ID`. If `process.env.NODE_UNIQUE_ID` is
 undefined, then `isMaster` is `true`.
 
 ## cluster.isWorker
+<!-- YAML
+added: v0.6.0
+-->
 
 * {Boolean}
 
 True if the process is not a master (it is the negation of `cluster.isMaster`).
 
 ## cluster.schedulingPolicy
+<!-- YAML
+added: v0.11.2
+-->
 
 The scheduling policy, either `cluster.SCHED_RR` for round-robin or
 `cluster.SCHED_NONE` to leave it to the operating system. This is a
@@ -617,6 +699,9 @@ distribute IOCP handles without incurring a large performance hit.
 values are `"rr"` and `"none"`.
 
 ## cluster.settings
+<!-- YAML
+added: v0.7.1
+-->
 
 * {Object}
   * `execArgv` {Array} list of string arguments passed to the Node.js
@@ -638,6 +723,9 @@ the settings, including the default values.
 This object is not supposed to be changed or set manually, by you.
 
 ## cluster.setupMaster([settings])
+<!-- YAML
+added: v0.7.1
+-->
 
 * `settings` {Object}
   * `exec` {String} file path to worker file.  (Default=`process.argv[1]`)
@@ -680,6 +768,9 @@ cluster.fork(); // http worker
 This can only be called from the master process.
 
 ## cluster.worker
+<!-- YAML
+added: v0.7.0
+-->
 
 * {Object}
 
@@ -698,6 +789,9 @@ if (cluster.isMaster) {
 ```
 
 ## cluster.workers
+<!-- YAML
+added: v0.7.0
+-->
 
 * {Object}