Add syntax files from upstream vim repository

syntax/catalog.vim

@@ -0,0 +1,34 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax file
+" Language:	sgml catalog file
+" Maintainer:	Johannes Zellner <johannes@zellner.org>
+" Last Change:	Fr, 04 Nov 2005 12:46:45 CET
+" Filenames:	/etc/sgml.catalog
+" $Id: catalog.vim,v 1.2 2005/11/23 21:11:10 vimboss Exp $
+
+" Quit when a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+syn case ignore
+
+" strings
+syn region  catalogString start=+"+ skip=+\\\\\|\\"+ end=+"+ keepend
+syn region  catalogString start=+'+ skip=+\\\\\|\\'+ end=+'+ keepend
+
+syn region  catalogComment      start=+--+   end=+--+ contains=catalogTodo
+syn keyword catalogTodo		TODO FIXME XXX NOTE contained
+syn keyword catalogKeyword	DOCTYPE OVERRIDE PUBLIC DTDDECL ENTITY CATALOG
+
+
+" The default highlighting.
+hi def link catalogString		     String
+hi def link catalogComment		     Comment
+hi def link catalogTodo			     Todo
+hi def link catalogKeyword		     Statement
+
+let b:current_syntax = "catalog"
+
+endif