[gtk/ebassi/broadway-docs] docs: Update the Broadway instructions

[Emmanuele Bassi <ebassi src gnome org>]

commit 3fdedce8f690081a746e360b4da5ee7a6ba525ef
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Mar 31 20:06:54 2021 +0100

    docs: Update the Broadway instructions
    
    The Broadway server binary is now versioned, and it's not compatible
    with the GTK3 server.

 docs/reference/gtk/broadway.md | 42 ++++++++++++++++++++++++------------------
 1 file changed, 24 insertions(+), 18 deletions(-)
---
diff --git a/docs/reference/gtk/broadway.md b/docs/reference/gtk/broadway.md
index 8bf24c43c1..99987845cf 100644
--- a/docs/reference/gtk/broadway.md
+++ b/docs/reference/gtk/broadway.md
@@ -3,27 +3,29 @@ Slug: broadway
 
 ## Using GTK with Broadway
 
-The GDK Broadway backend provides support for displaying GTK
-applications in a web browser, using HTML5 and web sockets. To run
-your application in this way, select the Broadway backend by setting
-`GDK_BACKEND=broadway`. Then you can make your application appear in
-a web browser by pointing it at `http://127.0.0.1:8080`. Note that
-you need to enable web sockets in your web browser.
+The GDK Broadway backend provides support for displaying GTK applications in
+a web browser, using HTML5 and web sockets.
 
-You can choose a different port from the default 8080 by setting
-the `BROADWAY_DISPLAY` environment variable to the port that you
-want to use.
+To run your application in this way, select the Broadway backend by setting
+`GDK_BACKEND=broadway`. Then you can make your application appear in a web
+browser by pointing it at `http://127.0.0.1:8080`. Note that you need to
+enable web sockets in your web browser.
 
-It is also possible to use multiple GTK applications in the same
-web browser window, by using the Broadway server, `broadwayd`, that
-ships with GTK. To use broadwayd, start it like this:
+You can choose a different port from the default 8080 by setting the
+`BROADWAY_DISPLAY` environment variable to the port that you want to use.
+
+It is also possible to use multiple GTK applications in the same web browser
+window, by using the Broadway server, `gtk4-broadwayd`, that ships with GTK.
+To start the Broadway server use:
 
 ```
-broadwayd :5
+gtk4-broadwayd :5
 ```
 
 Then point your web browser at `http://127.0.0.1:8085`.
-Start your applications like this:
+
+Once the Broadway server is running, you can start your applications like
+this:
 
 ```
 GDK_BACKEND=broadway BROADWAY_DISPLAY=:5 gtk4-demo
@@ -31,9 +33,13 @@ GDK_BACKEND=broadway BROADWAY_DISPLAY=:5 gtk4-demo
 
 ## Broadway-specific environment variables
 
-### BROADWAY\_DISPLAY
+### `BROADWAY_DISPLAY`
 
 Specifies the Broadway display number. The default display is 0.
-The display number determines the port to use when connecting
-to a Broadway application via the following formula:
-`port = 8080 + display`
+
+The display number determines the port to use when connecting to a Broadway
+application via the following formula:
+
+```
+port = 8080 + display
+```