[Miscellaneous fixes]

[Miscellaneous fixes]

* gnus-srvr.el (gnus-server-agent-face, gnus-server-opened-face)
(gnus-server-closed-face, gnus-server-denied-face)
(gnus-server-offline-face): Remove variable.
(gnus-server-font-lock-keywords): Use faces that are not aliases.

* gnus-util.el (gnus-message-with-timestamp-1): Use log-message instead
of modifying message-stack directly for XEmacs.

* mm-util.el (mm-decode-coding-string, mm-encode-coding-string)
(mm-decode-coding-region, mm-encode-coding-region): Don't modify string
if the coding-system argument is nil for XEmacs.

* nnrss.el (nnrss-compatible-encoding-alist): Inherit the value of
mm-charset-override-alist.

* rfc2047.el: Don't require base64; require rfc2045 for the function
rfc2045-encode-string.
(rfc2047-encode-parameter): Use rfc2045-encode-string to quote or not
to quote the parameter value.