(nnspool-retrieve-headers, nnspool-retrieve-headers-with-nov,
nnspool-find-file): Override `nnheader-file-coding-system' by
`nnspool-file-coding-system' for gnspool on Windows 95/NT.
'nnmail-file-coding-system' by 'nnmail-active-file-coding-system'.
(nnfolder-request-list, nnfolder-possibly-change-group): Protect
from conversion by `pathname-coding-system' for XEmacs/mule.
(nnfolder-group-pathname): Encode pathname for Emacs 20.
(nnheader-file-coding-system): New variable.
(nnheader-group-pathname): Encode pathname for Emacs 20.
(nnheader-find-file-noselect): Bind `coding-system-for-read' with
`nnheader-file-coding-system' for Emacs/mule and XEmacs/mule.
(nnheader-insert-file-contents): Bind `coding-system-for-read'
with `nnheader-file-coding-system' for Emacs/mule and XEmacs/mule.
(gnus-unstructured-field-decoder): New variable.
(gnus-get-newsgroup-headers, gnus-nov-parse-line): Use
`gnus-structured-field-decoder' and
`gnus-unstructured-field-decoder' for Subject field.
(nnmail-insert-xref): Encode pathname for Emacs 20.
(nnmail-write-region, nnmh-retrieve-headers, nnmh-request-article,
nnmh-request-group, nnmh-possibly-change-directory): Protect from
conversion by `pathname-coding-system' for XEmacs/mule.
(nnmail-pathname-coding-system): New variable.
(nnmail-group-pathname): Encode pathname for Emacs 20.
nnmail-file-coding-system): New variable.
(nnmail-find-file): Bind `coding-system-for-read' with
`nnmail-file-coding-system' for Emacs/mule and XEmacs/mule.
(nnmail-write-region): Bind `coding-system-for-write' with
`nnmail-file-coding-system' for Emacs/mule and XEmacs/mule.
function to encode text before sending by news.
(gnus-mule-message-send-mail-function): New function to encode
text before sending by mail.
(gnus-mule-initialize): Add gnus-mule-message-send-news-function
to the hook message-send-news-hook. Add
gnus-mule-message-send-mail-function to the hook
message-send-mail-hook.