Ticket #16606: 16606.2.patch

wp-includes/class-http.php

@@ -872 +872 @@
                 if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
                         return false;
 
-                return apply_filters('use_streams_transport', true, $args);
+                $use = in_array( 'http', stream_get_wrappers() );
+
+                if ( $use && isset( $args['ssl'] ) && $args['ssl'] ) {
+                        $use = in_array( 'ssl', stream_get_transports() );
+                }
+
+                return (bool) apply_filters( 'use_streams_transport', $use, $args );
         }
 }