(rmail-convert-to-babyl-format) searches for rmail-unix-mail-delimiter should be case-sensitive

[Jonathan Kamens]

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In GNU Emacs 21.2.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2002-11-05 on stripples.devel.redhat.com
configured using `configure  --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu 
--target=i386-redhat-linux-gnu --program-prefix= --prefix=/usr 
--exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc 
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib 
--libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com 
--mandir=/usr/share/man --infodir=/usr/share/info --with-gcc --with-pop 
--with-sound'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: nil

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

This search in rmail-convert-to-babyl-format:

                 (if (re-search-forward
                      (concat "^[\^_]?\\("
                              rmail-unix-mail-delimiter
                              "\\|"
                              rmail-mmdf-delim1 "\\|"
                              "^BABYL OPTIONS:\\|"
                              "\^L\n[01],\\)") nil t)

should be done with case-fold-search set to nil, as opposed to right
now, when it's set to t.  Unix mail delimiters are case-sensitive.

I actually encountered a message today with text in the middle of it
that matched rmail-unix-mail-delimiter case-insensitively, which
caused rmail-convert-to-babyl-format to fail.

  jik