* nnmbox.el (nnmbox-request-article): Don't assume delim regexp matches newline.

* nnmbox.el (nnmbox-request-article): Don't assume delim regexp matches newline.
(nnmbox-request-accept-article): Don't change article in source buffer;
 narrow to header to use message-fetch-field rather than nnmail-fetch-field;
 use with-current-buffer instead of save-excursion.
(nnmbox-request-replace-article): Quote lines that'll be misidentified as
 delimiters; make sure article ends with newline.
(nnmbox-delete-mail): Correct last position of article to be deleted;
 ignore X-Gnus-Newsgroup header in article body.
(nnmbox-save-mail): Quote lines looking like delimiters at the right positions;
 make sure article ends with newline.

* message.el (message-display-abbrev): Don't infloop when a user inserts SPC in
 the beginning of header.

* lpath.el: Don't bind define-ccl-program for non-Mule XEmacs;
 bind coding-system-for-read and coding-system-for-write for XEmacs having no
 file-coding feature.

* dgnushack.el: Bind or autoload define-ccl-program for XEmacs.