Function validate_guest_init_dropins

crates/openshell-driver-vm/src/driver.rs:4747–4756

(dropins: &[GuestInitDropin])

}

fn validate_guest_init_dropins(dropins: &[GuestInitDropin]) -> Result<(), String> {
    let mut names = HashSet::new();
    for dropin in dropins {
        validate_guest_init_dropin_name(&dropin.name)?;
        if !names.insert(dropin.name.clone()) {
            return Err(format!("duplicate VM guest init drop-in '{}'", dropin.name));
        }
    }
    Ok(())
}

fn validate_guest_init_dropin_name(name: &str) -> Result<(), String> {
    if name.is_empty() || name == "." || name == ".." {