Change the way citadel-desktop-sync works so that gnome-shell
can be aware of applications from several realms at once.
Each application id is now placed in a separate namespace by
adding a prefix to the desktop filename.
The concept of an 'unsealed' RealmFS no longer exists so support for this has been
removed. The result is much less complex and easier to understand and maintain.
Keyring is an encrypted file to store secrets. The encryption key is
derived from the disk decryption passphrase so that the file can be
automatically decrypted and processed during boot.
The keys contained in the keyring file are loaded into the kernel key
store so that they can later be retrieved by other components.
Currenly during installation a signing key is generated and stored in
the keyring so that the system can transparently sign RealmFS images
when the user modifies or updates them.
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.
