* nnheader.el (nnheader-find-file-noselect): Call

* nnheader.el (nnheader-find-file-noselect): Call
`find-file-noselect-as-coding-system' with CODING-SYSTEM as the 1st arg.

* gnus-score.el (gnus-score-load-score-alist): Call
`insert-file-contents-as-coding-system' with CODING-SYSTEM as the 1st arg.
* nnmail.el (nnmail-find-file): Ditto.
* nnheader.el (nnheader-insert-file-contents): Ditto.

* score-mode.el (gnus-score-edit-exit): Call `write-region-as-coding-system'
as the 1st arg.
* gnus-start.el (gnus-save-newsrc-file): Ditto.

* gnus-start.el (gnus-read-newsrc-el-file): Call
`insert-file-contents-as-coding-system' with CODING-SYSTEM as the 1st arg.

* gnus-score.el (gnus-score-save): Call `gnus-write-buffer-as-coding-system'
with CODING-SYSTEM as the 1st arg.
* gnus-cache.el (gnus-cache-possibly-enter-article): Ditto.
(gnus-cache-save-buffers): Ditto.

* gnus-util.el (gnus-write-buffer-as-coding-system): Be CODING-SYSTEM the 1st
arg.

* nnmail.el (nnmail-write-region): Call `write-region-as-coding-system' as the
1st arg.
* gnus-agent.el (gnus-agent-expire): Ditto.
(gnus-agent-fetch-headers): Ditto.
(gnus-agent-flush-cache): Ditto.
(gnus-agent-fetch-articles): Ditto.
(gnus-agent-save-history): Ditto.
(gnus-agent-save-groups): Ditto.
(gnus-agent-save-active): Ditto.