Migration from Neo4j version 3.5 to Neo4j version 4.0.x.

    If you upgrade the package from a version < 4.0.x, the parameter
    dbms.allow_upgrade will be automatically set to true in the
    /etc/neo4j/neo4j.conf

    If you only upgrade a single instance, you can start neo4j, the migration
    will be done during startup.
    Once it's done you should set dbms.allow_upgrade=false and restart the
    database.

    You can find upstream information about the upgrade here:
    https://neo4j.com/docs/migration-guide

 -- Sophie Brun <sophie@offensive-security.com>  Mon, 27 Jul 2020 17:22:09 +0200
