curl and libcurl

There's a new wildcard cert attack made public here:
http://www.theregister.co.uk/2009/07/30/universal_ssl_certificate/

I took a pass over the name matching code, and unless something in openssl
or the code that gets at the subject names is somehow immune, the matching
logic seems to be vulnerable. If not, feel free to close.

If a fix is needed, I think it will require capturing the actual length of
the subject name to match with rather than relying on null terminated
strings. I couldn't actually follow the current code very well, so I'm
going to keep looking at it.