switch default catalogs to HTTPS

pkgs/racket-doc/pkg/scribblings/getting-started.scrbl

@@ -131,7 +131,7 @@ treated as a explicitly installed package.
 
 The PLT @tech{package catalog} at
 
-@centerline{@url{http://pkgs.racket-lang.org}}
+@centerline{@url{https://pkgs.racket-lang.org}}
 
 provides a centralized listing of available Racket packages. The PLT
 @tech{package catalog} normally will be the first place you check when
@@ -445,7 +445,7 @@ by a simple name until it is listed on a @tech{package catalog}.
 
 If you'd like to use the PLT @tech{package catalog}, browse
 to
-@link["http://pkgs.racket-lang.org/"]{http://pkgs.racket-lang.org/}
+@link["https://pkgs.racket-lang.org/"]{https://pkgs.racket-lang.org/}
 and upload a new package. You will need to create an account and log
 in first.
 
@@ -558,7 +558,7 @@ In your @racket[info.rkt], you should:
 ]
 
 Finally, when listing your package on
-@url{http://pkgs.racket-lang-org}, you should supply a GitHub source
+@url{https://pkgs.racket-lang-org}, you should supply a GitHub source
 using the URL format
 @tt{github://github.com/@nonterm{user}/@nonterm{repo}/@nonterm{rev}@optional{/@nonterm{path}}} (not
 the @tt{git://} or @exec{http://} format).

pkgs/racket-doc/pkg/scribblings/git-workflow.scrbl

@@ -102,7 +102,7 @@ develops only a few of them. The intended workflow is as follows:
 
   @commandline{@command{update} --lookup --catalog @nonterm{catalog} --clone @nonterm{path-to}/@nonterm{pkg-name}}
 
-  A suitable @nonterm{catalog} might be @url{http://pkgs.racket-lang.org}.}
+  A suitable @nonterm{catalog} might be @url{https://pkgs.racket-lang.org}.}
 
  @item{A newly cloned package will have the specified (or existing
   installation's) repository as its Git @exec{origin}. If you want to

pkgs/racket-doc/pkg/scribblings/pkg.scrbl

@@ -337,7 +337,7 @@ URL indicates a remote server, and a @litchar{file://} URL indicates a
 local catalog in the form of an SQLite database or a directory tree.
 
 PLT supports two @tech{package catalog} servers that are enabled by
-default: @url{http://pkgs.racket-lang.org} for new packages and
+default: @url{https://pkgs.racket-lang.org} for new packages and
 @url{http://planet-compats.racket-lang.org} for automatically
 generated packages for old @|PLaneT| packages. Anyone may host a
 @tech{package catalog}, and any file-serving HTTP host can act
@@ -1426,10 +1426,10 @@ tests, and documentation from a package before installing it.
 site (where a Racket distribution downloaded from the site is
 configured to consult the site for packages), at least for packages
 associated with the distribution. Beware that
-@url{http://pkgs.racket-lang.org/} generally refers to @tech{source
+@url{https://pkgs.racket-lang.org/} generally refers to @tech{source
 packages}, not @tech{built packages}. In the near future, built
-variants of the @url{http://pkgs.racket-lang.org/} packages will be
-provided at @url{http://pkg-build.racket-lang.org/catalog/}.
+variants of the @url{https://pkgs.racket-lang.org/} packages will be
+provided at @url{https://pkg-build.racket-lang.org/catalog/}.
 
 Some packages have been split at the source level into separate
 library, test, and documentation packages. For example,

pkgs/racket-doc/scribblings/guide/other.scrbl

@@ -28,7 +28,7 @@ many other installed libraries. Run @exec{raco docs} to find
 documentation for libraries that are installed on your system and
 specific to your user account.
 
-@link["http://pkgs.racket-lang.org/"]{The Racket package repository}
+@link["https://pkgs.racket-lang.org/"]{The Racket package repository}
 offer even more downloadable packages that are contributed by
 Racketeers.
 

racket/collects/pkg/private/config.rkt

@@ -45,8 +45,8 @@
   (define (get-default)
     (match k
       ['catalogs
-       (list "http://pkgs.racket-lang.org"
-             "http://planet-compats.racket-lang.org")]
+       (list "https://pkgs.racket-lang.org"
+             "https://planet-compats.racket-lang.org")]
       ['default-scope "user"]
       ['installation-name (version)]
       ['download-cache-dir (build-path (find-system-path 'addon-dir)