extended the description for the curl_multi_socket_action() change

  allows libcurl to avoid a call to poll()/select() for every call to

  curl_multi_socket*().

  I added a define in the public curl/multi.h header file that will make your

  existing application automatically use curl_multi_socket_action() instead of

  curl_multi_socket() when you recompile. But of course you'll get better

  performance if you adjust your code manually and actually pass in the

  correct action bitmask to this function.

Daniel S (14 April 2007)

- Jay Austin added "DH PARAMETERS" to the stunnel.pem certificate for the test

  suite to make stunnel run better in some (most?) environments.