httpN => protN and some other minor updates

tests/README

@@ -33,13 +33,14 @@ Logs:
 Data:
   All test-data are put in the data/ subdirctory.
 
-  For each tests there exist four files. Replace N with the test number:
+  For each tests there exist a few files, all with their own separate and
+  special purpose. Replace N with the test number:
 
     nameN.txt: test description as displayed when run
 
     commandN.txt: command line options for this test
 
-    httpN.txt: the full dump of the HTTP protocol communication that curl is
+    protN.txt: the full dump of the protocol communication that curl is
                expected to use when performing this test
 
     replyN.txt: the full dump the server should reply to curl for this test.