Renamed from soup-error.h, with types and defines renamed accordingly.

Renamed from soup-error.h, with types and defines renamed accordingly.

	* libsoup/soup-status.h: Renamed from soup-error.h, with types
	and defines renamed accordingly.

	* libsoup/soup-message.h (SoupMessage): Rename errorcode to
	status_code and errorphrase to reason_phrase. Remove errorclass.
	(SOUP_MESSAGE_IS_ERROR): Remove this. You can't classify redirects
	as being either "errors" or "not errors", so its semantics are
	guaranteed to be wrong sometimes.

	* libsoup/soup-message.c (soup_message_set_status,
	soup_message_set_status_full): Renamed

	* libsoup/soup-message-handlers.c
	(soup_message_add_status_code_handler,
	soup_message_add_status_class_handler): Rename.

	* libsoup/soup-session.c (soup_session_send_message): Make this
	return a status code rather than a status class.

	* libsoup/soup-message-private.h (SoupMessagePrivate): Remove some
	unrelated unused fields (retries, callback, user_data).

	* ...: Updates