* lisp/gnus/message.el (message-expand-name): Don't trust the return value of

* lisp/gnus/message.el (message-expand-name): Don't trust the return value of
bbdb-complete-name.
(message-check-news-header-syntax): Remove unused var `start'.
(message-idna-to-ascii-rhs-1): Remove unused vars `rhs' and `address'.
(message-inhibit-body-encoding): Move to before first use.
(mail-abbrev-mode-regexp, Expires, User-Agent, Lines, Distribution)
(To, References, In-Reply-To, Newsgroups, Subject, Path, From)
(Organization, Message-ID, Date, mh-previous-window-config):
Defvar the vars using dynamic scoping.