Get rid of server launch scripts?

[neogeographica]

It might be better to move command-line definition up into the command scripts. Localize server-configuration stuff a bit more. Have the command script define the command line and tell server_loop what command line to use; server_loop then doesn't have to do any naming-convention-based loading of other files.

Shared code could still be stashed in scriptlib as necessary, but the command scripts would be explicit about reading it in.

If/when code is changed, remember to update README.