Changes since 0.88.15
---------------------

- [patch-0.88.14i.ds.flagdoc.1] fixed the description of the flags in
  $hdr_format in the manual

- messages were not included in replies in the non-PGP version of Mutt

- [patch-0.88.15.me.reply_attach.1] fixed segfault when using replying to an
  attachment from the `attach' menu

- [patch-0.88.15.me.followup.1] fixed bug in generation of the
  mail-followup-to: field

- [patch-0.88.15.me.ret_val.1] fixed some unchecked return values from
  mx_open_new_message() and mx_append()

