grey.area: This is a bit of a grey area

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#' @title legacy code
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#'
#' @name legacy.code
#' @aliases missing.code extractHTMLAttachmentFromMSG
#' readAIMSHTMLAttachment
#' @description grey.area is a home for working code that does
#' not have a proper home yet.
#'
#' If you were expecting to find code that is not here, it may
#' have been rehoused, replaced or removed.
#'
#' Rehoused functions:
#'
#' Now in Umoh Edemeka's aircraftOPS package:
#'
#' extractHTMLAttachmentFromMSG.
#'
#' readAIMSHTMLAttachment
#'
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