Convert (most of) the test data files into genuine XML. A handful still

are not, due mainly to the lack of support for XML character entities
(e.g. & => & ).  This will make it easier to validate test files using
tools like xmllint, as well as edit and view them using XML tools.

tests/data/test160

@@ -1,6 +1,7 @@
+<testcase>
 # Server-side
 <reply>
-<data nocheck=true>
+<data nocheck="true">
 HTTP/1.1 200 OK swsclose
 Date: Thu, 09 Nov 2010 14:49:00 GMT
 Content-Length: 9
@@ -62,3 +63,4 @@ Accept: */*
 
 </protocol>
 </verify>
+</testcase>