httpN => protN and some other minor updates

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.