patch 9.1.0563: Cannot process any Key event

Problem:  Cannot process any Key event
Solution: Add the KeyInputPre autocmd
          (Shougo Matsushita)

closes: #15182

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: K.Takata <kentkt@csc.jp>
Signed-off-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index ed1cd43..cfeb28c 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -41607,6 +41607,7 @@
 Autocommands: ~
 
 |CursorMovedC|		after the cursor was moved in the comamnd-line
+|KeyInputPre|		process any Key event in any mode
 |SessionWritePost|	after writing the session file |:mksession|
 |TermResponseAll|	after the terminal response to |t_RV| and others is
 			received