If enabled this will mount /run/media/citadel directory into Realm as
~/Media directory. This makes mounted storage devices visible inside of
Realms. By default this option is enabled only for the main realm.
citadel-tool now installed with a hardlink for each binary tool and
dispatches on the exe path to the tool implementation. This makes
the build faster, uses less disk space, and makes it easier to
create new small tools.
