Update the syntax identifier.

I made it now show nested syntax groups in the status line.  This
will facilitate easier debugging of complex syntax files.

vim/vimrc.functions

@@ -17,6 +17,12 @@ function! MyFoldText()
 endfunction
 
 function! SyntaxItem()
-	return synIDattr(synID(line("."),col("."),1),"name")
+	"return synIDattr(synID(line("."),col("."),1),"name")
+	let res = []
+	for id in synstack(line("."), col("."))
+		let res = res + [ synIDattr( id, "name" ) ]
+	endfor
+	"return synIDattr(synID(line("."),col("."),1),"name")
+    return join( res, ":" )
 endfunction