"--instance" parameter is ignored

[marnanel]

The --instance commandline parameter does nothing if a default profile already exists.

For example, if an existing server has been set up, and the user types

tootstream --instance queer.party

then --profile will default to default, which will cause tootstream to look up the profile named "default" and use the --instance value therein instead of "queer.party". This is probably not what the user had in mind.

[craigmaloney]

In some ways the --instance parameter is a one-time use item for setting up the instance, whereas the profile then takes over.

It is confusing though, so I'm open to suggestions on how to either better clarify what's going on or make the process better.