docs/hacking-howto: a few little updates

docs/hacking-howto

@@ -244,11 +244,14 @@ image:bigpicture.png[The Big Picture]
 
 So, the hierarchy is:
 
+. *X11 root window*, the root container
 . *Virtual screens* (Screen 0 in this example)
-. *Workspaces* (Workspace 1 in this example)
+. *Content container* (there are also containers for dock windows)
-. *Table* (There can only be one table per Workspace)
+. *Workspaces* (Workspace 1 in this example, with horizontal orientation)
-. *Container* (left and right in this example)
+. *Split container* (vertically split)
-. *Client* (The two clients in the left container)
+. *X11 window containers*
+
+The data type is +Con+, in all cases.
 
 === Virtual screens
 
@@ -269,7 +272,7 @@ screen you are currently on.
 
 === Workspace
 
-A workspace is identified by its number. Basically, you could think of
+A workspace is identified by its name. Basically, you could think of
 workspaces as different desks in your office, if you like the desktop
 methaphor. They just contain different sets of windows and are completely
 separate of each other. Other window managers also call this ``Virtual
@@ -300,11 +303,11 @@ ensure that the operating system on which i3 is compiled has all the expected
 features, i3 comes with `include/queue.h`. On BSD systems, you can use man
 `queue(3)`. On Linux, you have to use google (or read the source).
 
-The lists used are `SLIST` (single linked lists), `CIRCLEQ` (circular
+The lists used are +SLIST+ (single linked lists), +CIRCLEQ+ (circular
-queues) and TAILQ (tail queues). Usually, only forward traversal is necessary,
+queues) and +TAILQ+ (tail queues). Usually, only forward traversal is necessary,
 so an `SLIST` works fine. If inserting elements at arbitrary positions or at
-the end of a list is necessary, a `TAILQ` is used instead. However, for the
+the end of a list is necessary, a +TAILQ+ is used instead. However, for the
-windows inside a container, a `CIRCLEQ` is necessary to go from the currently
+windows inside a container, a +CIRCLEQ+ is necessary to go from the currently
 selected window to the window above/below.
 
 == Naming conventions
@@ -314,14 +317,14 @@ should be chosen for those:
 
  * ``conn'' is the xcb_connection_t
  * ``event'' is the event of the particular type
- * ``container'' names a container
+ * ``con'' names a container
- * ``client'' names a client, for example when using a +CIRCLEQ_FOREACH+
+ * ``current'' is a loop variable when using +TAILQ_FOREACH+ etc.
 
 == Startup (src/mainx.c, main())
 
  * Establish the xcb connection
- * Check for XKB extension on the separate X connection
+ * Check for XKB extension on the separate X connection, load Xcursor
- * Check for RandR screens
+ * Check for RandR screens (with a fall-back to Xinerama)
  * Grab the keycodes for which bindings exist
  * Manage all existing windows
  * Enter the event loop
@@ -359,9 +362,10 @@ the correct state.
 Then, it looks through all bindings and gets the one which matches the received
 event.
 
-The bound command is parsed directly in command mode.
+The bound command is parsed by the cmdparse lexer/parser, see +parse_cmd+ in
++src/cmdparse.y+.
 
-== Manage windows (src/mainx.c, manage_window() and reparent_window())
+== Manage windows (src/main.c, manage_window() and reparent_window())
 
 `manage_window()` does some checks to decide whether the window should be
 managed at all:
@@ -381,7 +385,7 @@ After reparenting, the window type (`_NET_WM_WINDOW_TYPE`) is checked to see
 whether this window is a dock (`_NET_WM_WINDOW_TYPE_DOCK`), like dzen2 for
 example. Docks are handled differently, they don’t have decorations and are not
 assigned to a specific container. Instead, they are positioned at the bottom
-of the screen. To get the height which needsd to be reserved for the window,
+of the screen. To get the height which needs to be reserved for the window,
 the `_NET_WM_STRUT_PARTIAL` property is used.
 
 Furthermore, the list of assignments (to other workspaces, which may be on