In the README, since #2298, there has been this wording:

If the above configuration file is being used as a basis, be sure to update it with the hostname of the deployment (this should be the fully qualified domain name of the system).

Yet, in the walk-through for [how to authenticate an agent to communicate with VOLTTRON platform](https://volttron.readthedocs.io/en/develop/devguides/walk

[bug received by email]

I successfully managed to set up the connection, connect to the devices
I am interested to, send commands, see points, plot historical values,
etc., and also to save devices' data to a database with the command
dev_S10_AS01.save(), as explained in section 4.7 of the documentation
(dev_S10_AS01 is the name I gave to one of the controllers): the files
S10'AS01.db