Documenting --hub flag

Fixes SeleniumHQ#788

Author: diemol

website_and_docs/content/documentation/grid/configuration/cli_options.en.md

@@ -222,6 +222,7 @@ pull request updating this page.
 | `--vnc-env-var`| string | `START_XVFB` | Environment variable to check in order to determine if a vnc stream is available or not. |
 | `--no-vnc-port`| int | `7900` | If VNC is available, sets the port where the local noVNC stream can be obtained |
 | `--drain-after-session-count`| int | `1` | Drain and shutdown the Node after X sessions have been executed. Useful for environments like Kubernetes. A value higher than zero enables this feature. |
+| `--hub`| string | `http://localhost:4444` | The address of the Hub in a Hub-and-Node configuration. Can be a hostname or IP address (`hostname`), in which case the Hub will be assumed to be `http://hostname:4444`, the `--grid-url` will be the same `--publish-events` will be `tcp://hostname:4442` and `--subscribe-events` will be `tcp://hostname:4443`. If `hostname` contains a port number, that will be used for `--grid-url` but the URIs for the event bus will remain the same. Any of these default values may be overridden but setting the correct flags. If the hostname has  a protocol (such as `https`) that will be used too. |
 
 ### Relay
 

website_and_docs/content/documentation/grid/configuration/cli_options.ja.md

@@ -231,6 +231,7 @@ pull request updating this page.
 | `--vnc-env-var`| string | `START_XVFB` | Environment variable to check in order to determine if a vnc stream is available or not. |
 | `--no-vnc-port`| int | `7900` | If VNC is available, sets the port where the local noVNC stream can be obtained |
 | `--drain-after-session-count`| int | `1` | Drain and shutdown the Node after X sessions have been executed. Useful for environments like Kubernetes. A value higher than zero enables this feature. |
+| `--hub`| string | `http://localhost:4444` | The address of the Hub in a Hub-and-Node configuration. Can be a hostname or IP address (`hostname`), in which case the Hub will be assumed to be `http://hostname:4444`, the `--grid-url` will be the same `--publish-events` will be `tcp://hostname:4442` and `--subscribe-events` will be `tcp://hostname:4443`. If `hostname` contains a port number, that will be used for `--grid-url` but the URIs for the event bus will remain the same. Any of these default values may be overridden but setting the correct flags. If the hostname has  a protocol (such as `https`) that will be used too. |
 
 ### Relay
 

website_and_docs/content/documentation/grid/configuration/cli_options.pt-br.md

@@ -231,6 +231,7 @@ pull request updating this page.
 | `--vnc-env-var`| string | `START_XVFB` | Environment variable to check in order to determine if a vnc stream is available or not. |
 | `--no-vnc-port`| int | `7900` | If VNC is available, sets the port where the local noVNC stream can be obtained |
 | `--drain-after-session-count`| int | `1` | Drain and shutdown the Node after X sessions have been executed. Useful for environments like Kubernetes. A value higher than zero enables this feature. |
+| `--hub`| string | `http://localhost:4444` | The address of the Hub in a Hub-and-Node configuration. Can be a hostname or IP address (`hostname`), in which case the Hub will be assumed to be `http://hostname:4444`, the `--grid-url` will be the same `--publish-events` will be `tcp://hostname:4442` and `--subscribe-events` will be `tcp://hostname:4443`. If `hostname` contains a port number, that will be used for `--grid-url` but the URIs for the event bus will remain the same. Any of these default values may be overridden but setting the correct flags. If the hostname has  a protocol (such as `https`) that will be used too. |
 
 ### Relay
 

website_and_docs/content/documentation/grid/configuration/cli_options.zh-cn.md

@@ -231,6 +231,7 @@ pull request updating this page.
 | `--vnc-env-var`| string | `START_XVFB` | Environment variable to check in order to determine if a vnc stream is available or not. |
 | `--no-vnc-port`| int | `7900` | If VNC is available, sets the port where the local noVNC stream can be obtained |
 | `--drain-after-session-count`| int | `1` | Drain and shutdown the Node after X sessions have been executed. Useful for environments like Kubernetes. A value higher than zero enables this feature. |
+| `--hub`| string | `http://localhost:4444` | The address of the Hub in a Hub-and-Node configuration. Can be a hostname or IP address (`hostname`), in which case the Hub will be assumed to be `http://hostname:4444`, the `--grid-url` will be the same `--publish-events` will be `tcp://hostname:4442` and `--subscribe-events` will be `tcp://hostname:4443`. If `hostname` contains a port number, that will be used for `--grid-url` but the URIs for the event bus will remain the same. Any of these default values may be overridden but setting the correct flags. If the hostname has  a protocol (such as `https`) that will be used too. |
 
 ### Relay