ENABLE_MKTG_SITE has been serving double duty to both indicate that an Open edX installation is using a Drupal marketing site AND is using the Publisher workflow tool for managing course metadata. But now that publisher-frontend is available and the Publisher feature is no longer tied to the marketing site, we want to tease apart those two concerns. Hence ENABLE_PUBLISHER. Only really used so far in Studio, to control which fields are shown (if using Publisher, some fields are only editable in Publisher).
CMS (Content Management System) ------------------------------- This directory contains code relating to the course management portal for edX, also known as Studio.