Version 2.0.21 released.

Version 2.0.21 released.
(tramp-handle-file-newer-than-file-p): If mtime of both files is
known, return a useful result.  Better error message in case one
is a Tramp file and one isn't.
(tramp-handle-file-local-copy, tramp-handle-write-region)
(tramp-find-shell, tramp-open-connection-telnet)
(tramp-open-connection-rsh, tramp-open-connection-su)
(tramp-open-connection-setup-interactive-shell)
(tramp-post-connection, tramp-maybe-open-connection)
(tramp-method-out-of-band-p): Correct number of args for
`tramp-get-rsh-program' and similar functions.