XMLC, setEnableXTHMLCompatibilty

About a year ago, I submitted a patch which was "converted" to become the 
enableXHTMLCompatibilty of OutputOptions.  Aside from the name change, the 
functionality of the patch (always use "close tags" , rather than an implied 
close) was limited to only the SCRIPT tag. 

Based on my recent experiences, this is wrong.  ALL tags need to be closed 
with an explicit close tag to work in both Mozilla and IE.  This may, in 
fact, be exacerbated by the fact that we're sending "Content-type: 
text/html", but that's being done because there doesn't seem to be an agreed 
upon solution for xhtml (last time I looked).

David