2000.07.16
  initial release
2000.07.20
  bugfixes:
    - new articles were showing up as old; must sort output of
      nnmaildir-retrieve-headers
2000.07.31
  bugfixes:
    - new mail is now incorporated by nnmaildir-request-list instead of
      nnmaildir-retrieve-headers
  features:
    - headers and articles can be fetched by Message-ID
    - nnmaildir-retrieve-headers handles numeric fetch-old
    - multiple groups per server; one group per maildir
    - nnmaildir-directory is gone; nnmaildir-groups maps group names to
      maildirs
2000.08.01
  bugfixes:
    - narrow search for existing Lines: to just this article
    - request-list was reporting the lowest article number of new, empty
      maildirs as 1, and the largest as 0
  features:
    - request-expire-articles, controlled by nnmail-expiry-wait{,-function}
    - request-rename-group - requires user to update select method manually
  internals:
    - request-type - returns `mail'
2000.08.02
  bugfixes:
    - nnheader-fold-continuation-lines disappeared; it's back
    - open-server would trigger an error when reporting one
  features:
    - request-delete-group - also requires user assistance
2000.08.03
  bugfixes:
    - -request-expire-articles couldn't default to current group
  internals:
    - -i-curgrp is now defvoo'd instead of a server-indexed alist, and refers
      to a -groups entry instead of a string
2000.08.04
  bugfixes:
    - -open-server no longer stomps on your select method
  internals:
    - .nnmaildir-max is now a symlink, no longer in cur/
2000.08.11
  bugfixes:
    - -request-article could have returned an article from another group when
      requesting a nonexistent article by article number
  features:
    - -request-move-article
  internals:
    - -request-list runs faster, updating max only once
2000.09.03
  bugfixes:
    - -retrieve-headers never actually handled numeric fetch-old
    - -request-{rename,delete}-group no longer require user help
    - -request-expire-articles returns a correct article list
  features:
    - -request-replace-article
    - -groups is now just a list of maildirs; group names are stored in the
      maildirs
    - -add-lines controls whether Lines: is added when missing
  internals:
    - major rewrite for performance; .nnmaildir-max replaced with .nnmaildir,
      storing NOV lines & other info
    - old tmp/ files are deleted in -open-server instead of -close-server
      (which has evaporated); tmp/ files with multiple hard links are also
      deleted
2000.09.21
  bugfixes:
    - -request-move-article now removes the in-memory record of a message along
      with the message file
    - more error reporting
    - generated Xrefs are now well-formed
  features:
    - -request-accept-article
2000.09.28
  bugfixes:
    - -request-accept-article correctly finds end of a header
    - Xrefs track changes in group names
    - gnus-declare-backend is called
  features:
    - -wipe-on-delete
2000.10.04
  bugfixes:
    - -request-list lists groups as writable
    - no need for 'utc in (format-time-string "%s")
    - -request-list was setting msgid globally, not in (let)
    - tabs are replaced with spaces in NOV lines
  features:
    - -request-scan
    - -retrieve-groups
2001.04.11
  bugfixes:
    - tabs are replaced with spaces in Message-IDs
    - XEmacs doesn't have (forward-point); thanks Rick Wash
    - XEmacs capitalizes error messages differently; thanks Rick Wash
    - messages are moved between groups by linking instead of copying
      (sometimes, anyway.  still working on this.)
    - others; it's hard to keep track during a rewrite
  features:
    - marks are stored in the backend; article numbers are dynamically
      reassigned to keep them small and consecutive, thanks to
      -request-update-info and -request-set-mark
    - server parameter "directory" names a directory containing maildirs; new
      maildirs are scanned for by -request-scan
    - server parameter "directory-files" specifies the directory-files function
      to use to scan "directory"
    - server parameter "-wipe-on-delete" is gone; better to decrypt encrypted
      articles on the fly in -request-article (but we don't, yet)
    - all group parameters can be set to forms which will be eval'ed
    - group parameter "directory-files" specifies the directory-files function
      to use to scan maildir directories
    - group parameter "read-only" allows reading unwritable maildirs
    - group parameter "distrust-Lines:" forces counting of lines for NOV data
    - group parameter "always-marks" gives a list of marks that all articles
      should appear to have set
    - group parameter "never-marks" gives a list of marks that no articles
      should appear to have set; overrides always-marks
    - group parameter "expire-age" gives the minimum age of an article before
      expiry, in seconds
    - group parameter "expire-group" gives the name of a group to move articles
      into when expiring
    - variable "nnmaildir-article-file-name" is set by -request-article
    - -request-post uses message-send-mail function instead of
      mail-send-and-exit
  internals:
    - major rewrite for flexibility, reliability, and performance
    - .nnmaildir replaced with .nnmaildir/*
    - no more nnoo, no more nnmail
    - no need for gnus-atomic-progn; memory data structures are designed for
      safe updates
2001.04.14
  bugfixes:
    - -server-opened checks whether the server was opened *successfully*
    - -open-server sets the error message for the correct server
  internals:
    - symlink names are the only way to name groups
    - -request-scan doesn't need groups' devices and inodes anymore
    - -request-scan scans the server directory only after it changes
    - -update-info scans mark directories only after they change
    - modtimes are now stored as (high low), not (high . low)
    - use delete-file instead of --unlink for files found in directory-files
    - don't store maildir paths in groups; calculate them from the server
      directory and group name
    - insert numbers with princ
2001.04.16
  bugfixes:
    - new mail is found with only one "g" instead of two
  internals:
    - code cleanup for -request-group
2001.04.24
  bugfixes:
    - gnus-extra-headers is handled correctly; thanks Jost Krieger
2001.07.30
  bufixes:
    - narrow to header before nnheader-parse-head
  features:
    - server parameter get-new-mail allows conventional mail splitting
2001.08.29
  bugfixes:
  - NOV data containing carriage returns was mangled
  - -open-server and -close-server were not idempotent; thanks Rob Browning
  - cached NOV data was not regenerated when NOV file was missing
  - -request-delete-group was trying to rmdir a symlink
  - -request-delete-group was trying to lstat ".../"
  - -request-delete-group didn't delete .nnmaildir/
  - -request-delete-group mishandled symlinks to "~..."
  - nnmaildir--unlink didn't unlink symlinks to nonexistent files
  features:
  - -request-create-group (requires the create-directory server parameter)
  - oops - group parameters can't be lists; wrap them in vectors
  - -request-newgroups
  internal:
  - filenames of delivered messages get the current time, and new messages
    are sorted by filename, not modtime; thanks Rob Browning
2001.09.11
  bugfixes:
  - use 'address in gnus-declare-backend
  - don't throw an error for repeated numbers in ranges
2001-12-19
  bugfixes:
  - don't assume -open-server is called before anything else; thanks
    Harry Putnam
  - don't assume article range is sorted in -request-retrieve-headers
  features:
  - new function -article-number-to-file-name