Creates a #SoupCookieJarSqlite. cookies. If @read_only is %FALSE, then the non-session cookies will be written to @filename when the 'changed' signal is emitted from the jar. (If @read_only is %TRUE, then the cookie jar will only be used for this session, and changes made to it will be lost when the jar is destroyed.) the new #SoupCookieJar the filename to read to/write from, or %NULL %TRUE if @filename is read-only