Feature/callbacks (#2678)

* wip

* initialize callbacks

* wip

* smtp

* list_service_interfaces

* wip

* wip

* fix domains

* fix hostname handling in NetService

* misc fixes

* getInstalledPackages

* misc fixes

* publish v6 lib

* refactor service effects

* fix import

* fix container runtime

* fix tests

* apply suggestions from review

core/startos/src/util/mod.rs

@@ -34,8 +34,10 @@ use crate::shutdown::Shutdown;
 use crate::util::io::create_file;
 use crate::util::serde::{deserialize_from_str, serialize_display};
 use crate::{Error, ErrorKind, ResultExt as _};
+
 pub mod actor;
 pub mod clap;
+pub mod collections;
 pub mod cpupower;
 pub mod crypto;
 pub mod future;