X-Debbugs-CC: monnier@iro.umontreal.ca

Two patches attached:

Patch 1:

     bindat (str, strz): Reject multibyte input strings

     * lisp/emacs-lisp/bindat.el (str) (strz): Signal an error if the user
     attempts to pack a multibyte string.
     * test/lisp/emacs-lisp/bindat-tests.el (str) (strz): Add tests.

Patch 2:

     bindat (str, strz): Convert to unibyte when packing

     * lisp/emacs-lisp/bindat.el (str) (strz): Allow callers to pack a
     multibyte string if it only contains ASCII and `eight-bit' characters.
     * doc/lispref/processes.texi (Bindat Types): Update documentation.
     * test/lisp/emacs-lisp/bindat-tests.el (str) (strz): Update tests.