misc doc updates

The updates are related to obscure changes for the package
system and installers.

pkgs/racket-pkgs/racket-doc/scribblings/raco/launcher.scrbl

@@ -59,10 +59,58 @@ the following additional associations apply to launchers:
        will call ignoring @racket[args]. If this name is not provided,
        the script will go through the GRacket executable as usual.}
 
+ @item{@racket['exe-is-gracket] (when @racket['exe-name] is used) ---
+       indicates that @racket['exe-name] refers to the GRacket
+       executable, which is potentially in a @filepath{lib}
+       subdirectory instead of with other GUI applications.}
+
  @item{@racket['relative?] (all platforms) --- a boolean, where
         @racket[#t] means that the generated launcher should find the
         base GRacket executable through a relative path.}
 
+ @item{@racket['start-menu?] (Windows) --- a boolean; @racket[#t]
+       indicates that the launcher should be in the @onscreen{Start}
+       menu by an installer that includes the launcher.  A
+       @racket['start-menu?] value is used only when
+       @racket['install-mode] is also specified.}
+
+ @item{@racket['extension-register] (Windows) --- a list of document
+       types for file-extension registrations to be performed by an
+       installer. Each document type is described by a list of six
+       items:
+
+         @itemlist[
+
+            @item{a human-readable string describing the document
+                  type, such as @racket["Racket Document"];}
+
+            @item{a string to use as a key for the document type,
+                  such as @racket["Racket.Document"];}
+
+            @item{a list of strings, where each string is a file
+                  extension without the dot, such as @racket['("rkt"
+                  "rktl" "rktd")];}
+
+            @item{a path to a file that supplies the icon, such as
+                  @racket["doc.ico"];}
+
+            @item{a string to represent the command line to handle a
+                  document with a matching extension, such as
+                  @racket["\"%1\""], where the string will be prefixed
+                  with a path to the launcher, and where @litchar{%1}
+                  will be replaced with the document path}
+          ]
+
+       An @racket['extension-registry] value is used only when
+       @racket['install-mode] is also specified.}
+
+ @item{@racket['install-mode] (Windows) --- either @racket['user] or
+       @racket['main], indicates whether the launcher is being
+       installed to a user-specific place or an installation-wide
+       place, which in turn determines where to record
+       @racket['start-menu?] and @racket['extension-registry]
+       information.}
+
 ]
 
 For Unix/X, the script created by @racket[make-mred-launcher] detects
@@ -354,6 +402,14 @@ are as follows:
  @item{@filepath{.wmclass} @'rarr @racket['wm-class] as the literal
        content, removing a trailing newline if any; for use on Unix}
 
+ @item{@filepath{.startmenu} @'rarr @racket['start-menu?] as @racket[#t]
+       (the file content is ignored) for use on Windows}
+
+ @item{@filepath{.extreg} @'rarr @racket['extension-register] as
+       @racket[read] content (a single S-expression), but with
+       relative (to the @filepath{.extreg} file) paths converted
+       absolute; for use on Windows}
+
 ]}
 
 @defparam[current-launcher-variant variant symbol?]{

pkgs/racket-pkgs/racket-doc/scribblings/raco/setup.scrbl

@@ -9,6 +9,7 @@
                     setup/option-unit
                     setup/option-sig
                     setup/dirs
+                    setup/getinfo
                     setup/main-collects
                     setup/path-to-relative
                     setup/xref scribble/xref
@@ -350,10 +351,11 @@ Optional @filepath{info.rkt} fields trigger additional actions by
            change.}
 
      @item{@racket['no-depend-on] : Removes the document for
-           consideration for other dependencies. This mode is
-           typically used with @racket['always-run] to avoid
-           unnecessary dependencies that prevent reaching a stable
-           point in building documentation.}
+           consideration for other dependencies. Furthermore,
+           references from the document to other documents are always
+           direct, instead of potentially indirect (i.e., resolved at
+           document-viewing time and potentially redirected to a
+           remote site).}
 
      @item{@racket['main-doc-root] : Designates the root document for
            the main installation. The document that currently has this
@@ -556,11 +558,13 @@ Optional @filepath{info.rkt} fields trigger additional actions by
 
  @item{@indexed-racket[install-collection] : @racket[path-string?]  --- A
    library module relative to the collection that provides
-   @racket[installer]. The @racket[installer] procedure accepts either
-   one or two arguments. The first argument is a directory path to the
+   @racket[installer]. The @racket[installer] procedure accepts one
+   to three arguments. The first argument is a directory path to the
    parent of the Racket installation's @filepath{collects} directory; the
    second argument, if accepted, is a path to the collection's own
-   directory. The procedure should perform collection-specific
+   directory; the third argument, if accepted, is a boolean indicating
+   whether the collection is installed as user-specific (@racket[#f])
+   or installation-wide (@racket[#f]). The procedure should perform collection-specific
    installation work, and it should avoid unnecessary work in the case
    that it is called multiple times for the same installation.}