Never use CURLOPT_SSL_VERIFYHOST with a value of 2

(raptor_www_curl_set_ssl_verify_options):
curl 7.28.1 removed the value 1 from being legal:
http://daniel.haxx.se/blog/2012/10/25/libcurl-claimed-to-be-dangerous/

CURL GIT commit da82f59b697310229ccdf66104d5d65a44dfab98
Sat Oct 27 12:31:39 2012 +0200

Legal values are:
0 to disable host verifying
2 (default) to enable host verifyinging