Added text about curl.haxx.se not being a good test target for people's

libcurl experiments...

docs/examples/README

@@ -12,3 +12,7 @@ examples. Just edit the file according to your system and requirements first.
 
 Try the php/examples/ directory for PHP programming snippets!
 
+  *PLEASE* do not use the curl.haxx.se site as a test target for your libcurl
+  applications/experiments. Even if the examples in this directory use that
+  site as an example URL at some places, it doesn't mean that the URLs work or
+  that we expect you to actually torture our web site with your tests! Thanks.