Remove cURL close policy related constants

These options don't do anything and they never have.

Refs:
  http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTCLOSEPOLICY
  http://curl.haxx.se/mail/lib-2006-11/0301.html

Author: DaveRandom

ext/curl/interface.c

@@ -621,7 +621,6 @@ PHP_MINIT_FUNCTION(curl)
 	REGISTER_CURL_CONSTANT(CURLOPT_BUFFERSIZE);
 	REGISTER_CURL_CONSTANT(CURLOPT_CAINFO);
 	REGISTER_CURL_CONSTANT(CURLOPT_CAPATH);
-	REGISTER_CURL_CONSTANT(CURLOPT_CLOSEPOLICY);
 	REGISTER_CURL_CONSTANT(CURLOPT_CONNECTTIMEOUT);
 	REGISTER_CURL_CONSTANT(CURLOPT_COOKIE);
 	REGISTER_CURL_CONSTANT(CURLOPT_COOKIEFILE);
@@ -711,13 +710,6 @@ PHP_MINIT_FUNCTION(curl)
 	REGISTER_CURL_CONSTANT(CURLOPT_WRITEFUNCTION);
 	REGISTER_CURL_CONSTANT(CURLOPT_WRITEHEADER);
 
-	/* Constants effecting the way CURLOPT_CLOSEPOLICY works */
-	REGISTER_CURL_CONSTANT(CURLCLOSEPOLICY_CALLBACK);
-	REGISTER_CURL_CONSTANT(CURLCLOSEPOLICY_LEAST_RECENTLY_USED);
-	REGISTER_CURL_CONSTANT(CURLCLOSEPOLICY_LEAST_TRAFFIC);
-	REGISTER_CURL_CONSTANT(CURLCLOSEPOLICY_OLDEST);
-	REGISTER_CURL_CONSTANT(CURLCLOSEPOLICY_SLOWEST);
-
 	/* */
 	REGISTER_CURL_CONSTANT(CURLE_ABORTED_BY_CALLBACK);
 	REGISTER_CURL_CONSTANT(CURLE_BAD_CALLING_ORDER);
@@ -2079,7 +2071,6 @@ static int _php_curl_setopt(php_curl *ch, long option, zval **zvalue, zval *retu
 			}
 		case CURLOPT_AUTOREFERER:
 		case CURLOPT_BUFFERSIZE:
-		case CURLOPT_CLOSEPOLICY:
 		case CURLOPT_CONNECTTIMEOUT:
 		case CURLOPT_COOKIESESSION:
 		case CURLOPT_CRLF: