CONTRIBUTE: Announce the move of contrib/ to a new repository

CONTRIBUTE

@@ -1,8 +1,10 @@
--*- mode: org; fill-column:70 -*-
-
 The text below explains the rules for participating in Org mode
 development.
 
+* Org maintenance
+
+Org maintenance is explained on Worg: see [[https://orgmode.org/worg/org-maintenance.html][org-maintenance]].
+
 * Main contribution rules
 
 1. The master git repository is hosted publicly at [[https://orgmode.org][orgmode.org]].
@@ -62,25 +64,11 @@ development.
      preserve this and ask everyone to keep this in mind when
      proposing changes.
 
-* The contrib/ directory
+See [[https://orgmode.org/worg/org-contribute.html][worg/org-contribute]] for more guidance on how to contribute
+effectively.
 
-The git repository contains a =contrib/= directory.  This directory is
-the playing field for any developer, also people who have not (yet)
-signed the papers with the FSF.  You are free to add files to this
-directory, implementing extensions, new link types etc.
+* The =contrib/= directory
 
-Also non-Lisp extensions like scripts to process Org files in different
-ways are welcome in this directory.  You should provide documentation
-with your extensions, at least in the form of commentary in the file,
-better on worg.  Please discuss your extensions on
-[[mailto:emacs-orgmode@gnu.org][emacs-orgmode@gnu.org]].
+The git repository used to contain a =contrib/= directory, which was
+moved to https://git.sr.ht/~bzg/org-contrib before Org 9.5, which see.
 
-After files have been tested in =contrib/= and found to be generally
-useful, we may decide to clarify copyright questions and then move the
-file into the Org mode core.  This means they will be moved up to the
-root directory and will also eventually be added to GNU Emacs git
-repository.  The final decision about this rests with the maintainer.
-
-* Org maintenance
-
-Org maintenance is explained on Worg: see [[https://orgmode.org/worg/org-maintenance.html][org-maintenance]].