tests/README: add a new range, clean up some language

tests/README

@@ -203,25 +203,24 @@ The cURL Test Suite
  2.1 Test case numbering
 
      1   -  99   HTTP
-     100 - 199   FTP*
-     200 - 299   FILE*
+     100 - 199   FTP
+     200 - 299   FILE
      300 - 399   HTTPS
      400 - 499   FTPS
      500 - 599   libcurl source code tests, not using the curl command tool
      600 - 699   SCP/SFTP
      700 - 799   SOCKS4 (even numbers) and SOCK5 (odd numbers)
      800 - 899   POP3, IMAP, SMTP
-     1000 - 1299 miscellaneous*
-     1300 - 1399 unit tests*
-     1400 - 1499 miscellaneous*
+     1000 - 1299 miscellaneous
+     1300 - 1399 unit tests
+     1400 - 1499 miscellaneous
      1500 - 1599 libcurl source code tests, not using the curl command tool
                  (same as 5xx)
-     2000 - x    multiple sequential protocols per test case*
+     1600 - 1699 unit tests
+     2000 - x    multiple sequential protocols per test case
 
-  Since 30-apr-2003, there's nothing in the system that requires us to keep
-  within these number series, and those sections marked with * actually
-  contain tests for a variety of protocols. Each test case now specifies its
-  own server requirements, independent of test number.
+  There's nothing in the system that *requires* us to keep within these number
+  series.
 
 3. Write tests