Add syntax files from upstream vim repository

ftplugin/xml.vim

@@ -0,0 +1,68 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim filetype plugin file
+" Language:	xml
+" Maintainer:	Dan Sharp <dwsharp at users dot sourceforge dot net>
+" Last Changed: 20 Jan 2009
+" URL:		http://dwsharp.users.sourceforge.net/vim/ftplugin
+
+if exists("b:did_ftplugin") | finish | endif
+let b:did_ftplugin = 1
+
+" Make sure the continuation lines below do not cause problems in
+" compatibility mode.
+let s:save_cpo = &cpo
+set cpo-=C
+
+setlocal commentstring=<!--%s-->
+setlocal comments=s:<!--,m:\ \ \ \ \ ,e:-->
+
+setlocal formatoptions-=t
+if !exists("g:ft_xml_autocomment") || (g:ft_xml_autocomment == 1)
+    setlocal formatoptions+=croql
+endif
+
+
+" XML:  thanks to Johannes Zellner and Akbar Ibrahim
+" - case sensitive
+" - don't match empty tags <fred/>
+" - match <!--, --> style comments (but not --, --)
+" - match <!, > inlined dtd's. This is not perfect, as it
+"   gets confused for example by
+"       <!ENTITY gt ">">
+if exists("loaded_matchit")
+    let b:match_ignorecase=0
+    let b:match_words =
+     \  '<:>,' .
+     \  '<\@<=!\[CDATA\[:]]>,'.
+     \  '<\@<=!--:-->,'.
+     \  '<\@<=?\k\+:?>,'.
+     \  '<\@<=\([^ \t>/]\+\)\%(\s\+[^>]*\%([^/]>\|$\)\|>\|$\):<\@<=/\1>,'.
+     \  '<\@<=\%([^ \t>/]\+\)\%(\s\+[^/>]*\|$\):/>'
+endif
+
+"
+" For Omni completion, by Mikolaj Machowski.
+if exists('&ofu')
+  setlocal ofu=xmlcomplete#CompleteTags
+endif
+command! -nargs=+ XMLns call xmlcomplete#CreateConnection(<f-args>)
+command! -nargs=? XMLent call xmlcomplete#CreateEntConnection(<f-args>)
+
+
+" Change the :browse e filter to primarily show xml-related files.
+if has("gui_win32")
+    let  b:browsefilter="XML Files (*.xml)\t*.xml\n" .
+		\	"DTD Files (*.dtd)\t*.dtd\n" .
+		\	"All Files (*.*)\t*.*\n"
+endif
+
+" Undo the stuff we changed.
+let b:undo_ftplugin = "setlocal commentstring< comments< formatoptions<" .
+		\     " | unlet! b:match_ignorecase b:match_words b:browsefilter"
+
+" Restore the saved compatibility options.
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+endif