vim-patch:partial:cfa8f9a3f285 (#18858)

Update runtime files
cfa8f9a3f2

skip syntax/vim.vim (needs 8.2.4770)
skip doc/syntax.vim (needs several colorscheme patches)
skip further rewrite of manual

runtime/syntax/confini.vim

@@ -0,0 +1,12 @@
+" Vim syntax file
+" Language: confini
+
+" Quit if a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+" Use the cfg syntax for now, it's similar.
+runtime! syntax/cfg.vim
+
+let b:current_syntax = 'confini'