pub fn exit_code(&self) -> sysexits::ExitCode {
        match self {
            Self::ServerExitUnexpectedly(_) | Self::ServerAborted(_) => sysexits::ExitCode::Software,
            Self::LoadConfigFailure(_) | Self::LoadAclFailure(_) => sysexits::ExitCode::Config,
            Self::InsufficientParams(_) => sysexits::ExitCode::Usage,
        }
    }
The corresponding `sysexits::ExitCode` for this error.
src/error.rs