Add syntax files from upstream vim repository

syntax/manual.vim

@@ -0,0 +1,33 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax support file
+" Maintainer:	Bram Moolenaar <Bram@vim.org>
+" Last Change:	2016 Feb 01
+
+" This file is used for ":syntax manual".
+" It installs the Syntax autocommands, but no the FileType autocommands.
+
+if !has("syntax")
+  finish
+endif
+
+" Load the Syntax autocommands and set the default methods for highlighting.
+if !exists("syntax_on")
+  so <sfile>:p:h/synload.vim
+endif
+
+let syntax_manual = 1
+
+" Overrule the connection between FileType and Syntax autocommands.  This sets
+" the syntax when the file type is detected, without changing the value.
+augroup syntaxset
+  au! FileType *	exe "set syntax=" . &syntax
+augroup END
+
+" If the GUI is already running, may still need to install the FileType menu.
+" Don't do it when the 'M' flag is included in 'guioptions'.
+if has("menu") && has("gui_running") && !exists("did_install_syntax_menu") && &guioptions !~# 'M'
+  source $VIMRUNTIME/menu.vim
+endif
+
+endif