Rewrite more functions using buffer display specifiers.

Rewrite more functions using buffer display specifiers.

* electric.el (Electric-pop-up-window): Use buffer display
specifiers.

* emacs-lisp/elint.el (elint-display-log): Use
display-buffer-other-window.

* vc/pcvs-util.el (cvs-pop-to-buffer-same-frame): Use buffer
display specifiers.

* message.el (message-mail-other-window)
(message-news-other-window): Pass pop-to-buffer-other-window as
switch-function to message-pop-to-buffer.
(message-mail-other-frame, message-news-other-frame): Pass
pop-to-buffer-other-frame as switch-function to
message-pop-to-buffer.

* mh-comp.el (mh-send-other-window): Pass t as extra argument to
mh-send-sub.
(mh-send-sub): New optional argument OTHER-WINDOW. Pass extra
argument to mh-read-draft.
(mh-read-draft): New optional argument OTHER-WINDOW. Pass it in
suitable fashion to pop-to-buffer.