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/test512

@@ -1,7 +1,8 @@
+<testcase>
 #
 # Server-side
 <reply>
-<data mode=text>
+<data mode="text">
 HTTP/1.1 200 OK swsclose
 Date: Thu, 09 Nov 2010 14:49:00 GMT
 Server: yes
@@ -42,3 +43,4 @@ Accept: */*
 
 </protocol>
 </verify>
+</testcase>