Improved Symbian support for SSL.

Avoid unnecessary'if-else' nesting.

PS: Once again, sorry if the added files have executable perms on Linux.

PS: Sorry if the added file has executable perms on Linux, I didn't found anything related to it...

Removed the "lib" prefix under linux ("was "liblibcurl") and fixed import library name under Win32 (Added "_imp" for dynamically linked).

Initial CMake scripts (libcurl only), based on the merge of tetest scripts and mine. These are far to be functionnal yet.
PS: Hello world :)

  strdup() call failed.

  NSS is used. These ciphers were added in NSS 3.4 and require to be enabled
  explicitly.

If CURL_DISABLE_PROXY is defined, we must allow socks_sspi.c to call
Curl_blockread_all(). It is needed in code inside USE_WINDOWS_SSPI.

  library is found to support it.

  curl_easy_duphandle did not necessarily duplicate the CURLOPT_COOKIEFILE
  option. It only enabled the cookie engine in the destination handle if
  data->cookies is not NULL (where data is the source handle). In case of a
  newly initialized handle which just had the cookie support enabled by a
  curl_easy_setopt(handle, CURL_COOKIEFILE, "")-call, handle->cookies was
  still NULL because the setopt-call only appends the value to
  data->change.cookielist, hence duplicating this handle would not have the
  cookie engine switched on.

  We also concluded that the slist-functionality would be suitable for being
  put in its own module rather than simply hanging out in lib/sendf.c so I
  created lib/slist.[ch] for them.

  allocation of the memory BIO was not being properly checked.

  in the gnutls code where we were checking for negative values for errors,
  when the man pages state that GNUTLS_E_SUCCESS is returned on success and
  other values indicate error conditions.

  whenever you attempt to open a new connection.

  (http://curl.haxx.se/docs/adv_20090303.html also known as CVE-2009-0037) in
  which previous libcurl versions (by design) can be tricked to access an
  arbitrary local/different file instead of a remote one when
  CURLOPT_FOLLOWLOCATION is enabled. This flaw is now fixed in this release
  together this the addition of two new setopt options for controlling this
  new behavior:

  o CURLOPT_REDIR_PROTOCOLS controls what protocols libcurl is allowed to
  follow to when CURLOPT_FOLLOWLOCATION is enabled. By default, this option
  excludes the FILE and SCP protocols and thus you nee to explicitly allow
  them in your app if you really want that behavior.

  o CURLOPT_PROTOCOLS controls what protocol(s) libcurl is allowed to fetch
  using the primary URL option. This is useful if you want to allow a user or
  other outsiders control what URL to pass to libcurl and yet not allow all
  protocols libcurl may have been built to support.

  CURLOPT_LOCALPORT were used together (the local port bind failed), and
  Markus Koetter provided the fix!

  curl_global_init() function to properly maintain the performing functions
  thread-safe. We've previously (28 April 2007) moved the init to a later time
  just to avoid it to fail very early when libgcrypt dislikes the situation,
  but that move was bad and the fix should rather be in libgcrypt or
  elsewhere.

  It happened because the code used the struct for server-based auth all the
  time for both proxy and server auth which of course was wrong.