* gnus-agent.el (gnus-agent-save-active): Bind nnheader-file-coding-system to

* gnus-agent.el (gnus-agent-save-active): Bind nnheader-file-coding-system to
 gnus-agent-file-coding-system.

* gnus-cache.el (gnus-cache-save-buffers)
(gnus-cache-possibly-enter-article, gnus-cache-request-article)
(gnus-cache-retrieve-headers, gnus-cache-change-buffer)
(gnus-cache-possibly-remove-article, gnus-cache-articles-in-group)
(gnus-cache-braid-nov, gnus-cache-braid-heads)
(gnus-cache-generate-active, gnus-cache-rename-group)
(gnus-cache-delete-group, gnus-cache-update-file-total-fetched-for)
(gnus-cache-update-overview-total-fetched-for): Bind file-name-coding-system to
 nnmail-pathname-coding-system.
(gnus-cache-decoded-group-names, gnus-cache-unified-group-names): New variables.
(gnus-cache-decoded-group-name): New function.
(gnus-cache-file-name): Use it.
(gnus-cache-generate-active): Use non-decoded group name for active.

* gnus-util.el (gnus-write-buffer): Bind file-name-coding-system at the right
 place.
(gnus-write-active-file): Don't break non-ASCII group names.

* nntp.el (nntp-marks-changed-p): Bind file-name-coding-system to
 nnmail-pathname-coding-system.

* lpath.el: Bind default-file-name-coding-system, file-name-coding-system and
 language-info-alist for XEmacs.

* gnus-uu.el (gnus-uu-decode-save): Typo.