cleanup of field torrent_need_cert_alert::error (#2414)

deprecate field torrent_need_cert_alert::error

bindings/python/src/alert.cpp

@@ -852,7 +852,9 @@ void bind_alert()
         ;
     class_<torrent_need_cert_alert, bases<torrent_alert>, noncopyable>(
         "torrent_need_cert_alert", no_init)
+#ifndef TORRENT_NO_DEPRECATE
         .def_readonly("error", &torrent_need_cert_alert::error)
+#endif
         ;
 
     class_<add_torrent_alert, bases<torrent_alert>, noncopyable>(

include/libtorrent/alert_types.hpp

@@ -1810,8 +1810,9 @@ namespace libtorrent {
 
 		static constexpr alert_category_t static_category = alert::status_notification;
 		std::string message() const override;
-
-		error_code const error;
+#ifndef TORRENT_NO_DEPRECATE
+		error_code const TORRENT_DEPRECATED_MEMBER error;
+#endif
 	};
 
 	// The incoming connection alert is posted every time we successfully accept

include/libtorrent/torrent_handle.hpp

@@ -814,9 +814,7 @@ namespace aux {
 		// certificate in the .torrent file to be valid.
 		//
 		// The set_ssl_certificate_buffer() overload takes the actual certificate,
-		// private key and DH params as strings, rather than paths to files. This
-		// overload is only available when libtorrent is built against boost
-		// 1.54 or later.
+		// private key and DH params as strings, rather than paths to files.
 		//
 		// ``cert`` is a path to the (signed) certificate in .pem format
 		// corresponding to this torrent.