Add DirLocal to syntax file for vim.

runtime/syntax/vim.vim

@@ -65,7 +65,7 @@ syn keyword vimErrSetting contained	bioskey biosk conskey consk autoprint beauti
 
 " AutoCmd Events {{{2
 syn case ignore
-syn keyword vimAutoEvent contained	BufAdd BufCreate BufDelete BufEnter BufFilePost BufFilePre BufHidden BufLeave BufNew BufNewFile BufRead BufReadCmd BufReadPost BufReadPre BufUnload BufWinEnter BufWinLeave BufWipeout BufWrite BufWriteCmd BufWritePost BufWritePre CmdUndefined CmdwinEnter CmdwinLeave ColorScheme CompleteDone CursorHold CursorHoldI CursorMoved CursorMovedI EncodingChanged FileAppendCmd FileAppendPost FileAppendPre FileChangedRO FileChangedShell FileChangedShellPost FileEncoding FileReadCmd FileReadPost FileReadPre FileType FileWriteCmd FileWritePost FileWritePre FilterReadPost FilterReadPre FilterWritePost FilterWritePre FocusGained FocusLost FuncUndefined GUIEnter GUIFailed InsertChange InsertCharPre InsertEnter InsertLeave MenuPopup OptionSet QuickFixCmdPost QuickFixCmdPre QuitPre RemoteReply SessionLoadPost ShellCmdPost ShellFilterPost SourceCmd SourcePre SpellFileMissing StdinReadPost StdinReadPre SwapExists Syntax TabEnter TabLeave TermChanged TermResponse TextChanged TextChangedI User VimEnter VimLeave VimLeavePre VimResized WinEnter WinLeave 
+syn keyword vimAutoEvent contained	BufAdd BufCreate BufDelete BufEnter BufFilePost BufFilePre BufHidden BufLeave BufNew BufNewFile BufRead BufReadCmd BufReadPost BufReadPre BufUnload BufWinEnter BufWinLeave BufWipeout BufWrite BufWriteCmd BufWritePost BufWritePre CmdUndefined CmdwinEnter CmdwinLeave ColorScheme CompleteDone CursorHold CursorHoldI CursorMoved CursorMovedI DirChanged EncodingChanged FileAppendCmd FileAppendPost FileAppendPre FileChangedRO FileChangedShell FileChangedShellPost FileEncoding FileReadCmd FileReadPost FileReadPre FileType FileWriteCmd FileWritePost FileWritePre FilterReadPost FilterReadPre FilterWritePost FilterWritePre FocusGained FocusLost FuncUndefined GUIEnter GUIFailed InsertChange InsertCharPre InsertEnter InsertLeave MenuPopup OptionSet QuickFixCmdPost QuickFixCmdPre QuitPre RemoteReply SessionLoadPost ShellCmdPost ShellFilterPost SourceCmd SourcePre SpellFileMissing StdinReadPost StdinReadPre SwapExists Syntax TabEnter TabLeave TermChanged TermResponse TextChanged TextChangedI User VimEnter VimLeave VimLeavePre VimResized WinEnter WinLeave 
 
 " Highlight commonly used Groupnames {{{2
 syn keyword vimGroup contained	Comment Constant String Character Number Boolean Float Identifier Function Statement Conditional Repeat Label Operator Keyword Exception PreProc Include Define Macro PreCondit Type StorageClass Structure Typedef Special SpecialChar Tag Delimiter SpecialComment Debug Underlined Ignore Error Todo