Since the PAC URL is user supplied it’s unknown what state it actually is in, so we try to create a CFURL object from the raw string and if that fails, we URL-escape it (though not escaping slashes and colons).
Should fix issue #228.
We now bypass the global proxy if trying to connect to localhost (as some of our tests do) and we also hand the actual target URL to the potential proxy auto configuration (PAC) script.
The cf::wrap function returns a temporary object that can be converted to a CFType, but this object’s lifetime is that of the temporary object returned. By putting the result of cf::wrap into a C array we keep the CFTypeRef around longer than the temporary object.