(rmail-insert-inbox-text): Detect locked
RMAIL files at the outset, before copying any files. (rmail-find-all-files): Eliminate recursive scan. Rely on directory-files to do the filtering. (rmail-convert-to-babyl-format): Increase sit-for timeout to 3 seconds. (rmail-get-new-mail): Handle files in multiple batches, in case two inboxes have the same last name component. (rmail-show-message): Bind `end' after clearing the "unseen" attribute. (rmail-show-message): Clear `unseen' even if header is already reformatted--but don't do it if rmail-not-really-seen. (rmail-not-really-seen): New variable.
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