- Added a macro for curl_easy_setopt() that accepts three arguments and simply

does nothing with them, just to make sure libcurl users always use three
  arguments to this function. Due to its use of ... for the third argument, it
  is otherwise hard to detect abuse.

RELEASE-NOTES

@@ -20,6 +20,7 @@ This release includes the following changes:
  o added a type checking macro for curl_easy_setopt(), watch out for new
    warnings in code using libcurl (needs gcc-4.3 and currently only works
    in C mode)
+ o curl_easy_setopt() uses are now checked to use three arguments
 
 This release includes the following bugfixes: