* pgg-gpg.el (pgg-gpg-process-region): Use `make-temp-file' instead of
`make-temp-name'.
* pgg-pgp5.el (pgg-pgp5-process-region): Ditto.
(pgg-scheme-verify-region): Ditto.
(pgg-scheme-snarf-keys-region): Ditto.
* pgg-pgp.el (pgg-pgp-process-region): Ditto.
(pgg-scheme-verify-region): Ditto.
(pgg-scheme-snarf-keys-region): Ditto.
* smime.el (smime-process-region): Ditto.
(smime-verify-region): Ditto.
* mime-pgp.el (mime-verify-application/pgp-signature): Ditto.
(mime-verify-application/pkcs7-signature): Ditto.
* mime-play.el (mime-activate-mailcap-method): Make a temporary
directory of a temporary file for the mailcap application.
(mime-mailcap-method-sentinel): Follow the change above.
(mime-store-message/partial-piece): Set `default-file-modes' for
`make-directory'.
* mime-edit.el (mime-edit-split-and-send): Remove local variable
`mime-edit-draft-file-name'.