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/test152

@@ -1,6 +1,7 @@
+<testcase>
 # Server-side
 <reply>
-<data nocheck=1>
+<data nocheck="1">
 HTTP/1.0 401 BAD BOY
 Server: swsclose
 Content-Type: text/html
@@ -40,3 +41,4 @@ Accept: */*
 22
 </errorcode>
 </verify>
+</testcase>