src/06.01.03. The pkgsrc collections.pod: update repos description

note 4 official repos, +2 additional: games and wmaker

src/06.01.03. The pkgsrc collections.pod

@@ -1,11 +1,11 @@
 =head3 B<6.1.3. The pkgsrc collections>
 
 Packages' sources are organized in so-called collections.  There are
-five different layers (or five categories) of packages.
+four official collections:
 
 =over 2
 
-=item * I<pkgsrc-core>
+=item 1. I<pkgsrc-core>
 
 This collection contains build scripts and files for the packages
 required to create a basic system, on the basis of which you can build
@@ -22,26 +22,33 @@ L<pkgmaint|https://github.com/zeppe-lin/pkgmaint> and corresponding
 B<system/pkgmaint> package for various package maintaining utilities.
 It will not be superfluous to mention L<revdep(1)>.
 
-=item * I<pkgsrc-system>
+=item 2. I<pkgsrc-system>
 
 This collection contains build scripts and files for the packages
 required for minimal installation on real hardware: boot loader,
 filesystem utilities, hw-monitors, servers, and so on.  Packages in
 this collection depend B<only> on the C<pkgsrc-core> collection.
 
-=item * I<pkgsrc-xorg>
+=item 3. I<pkgsrc-xorg>
 
 This collection contains build scripts and files for the packages
 required for X Window System applications.  Packages in this
 collection depend on the C<pkgsrc-system> collection.
 
-=item * I<pkgsrc-desktop>
+=item 4. I<pkgsrc-desktop>
 
 This collection contains build scripts and files for the packages
 typically used on a desktop: web browser, music/video player, file
 manager, chat messenger, etc.  Packages in this collection depend on
 the C<pkgsrc-xorg> collection.
 
+=back
+
+In addition to the official ones, there are unofficial collections of
+packages:
+
+=over 2
+
 =item * I<pkgsrc-stuff>
 
 This collection contains build scripts and files for the packages that
@@ -51,6 +58,16 @@ contains packages of different (often dubious) quality and purpose, we
 will not use it in the examples and warn you that if you can live
 without it - it's better to do so.
 
+=item * I<pkgsrc-games>
+
+This collection contains build scripts and files for the games and
+emulators.
+
+=item * I<pkgsrc-wmaker>
+
+This collection contains build scripts and files for Window Maker &
+dockapps packages.
+
 =back
 
 =cut