Add icons to more of the servers.

These are not perfect, but better than using the default app icon. Feel
free to improve.

- DNS resolver: phonebook icon
- App-server: hand + app icon
- Keystore: key lock
- Launch daemon: croissant (to get the day started)
- Net server: hand + earth
- Package daemon: hand + package
- Power daemon: CF lightbulb

The beginnings of a launch_daemon for Haiku.

* This will be heavily inspired by Apple's launchd, as well as
systemd -- for now it really doesn't do a whole lot, though.
* What works so far: the configuration files are read, parsed, and
the jobs created.
* The jobs are even initialized, and their message ports created.
* BApplication now retrieves a previously created port from the
launch_daemon for use with BServer.
* Only the registrar actually uses this for now.

The beginnings of a launch_daemon for Haiku.

* This will be heavily inspired by Apple's launchd, as well as
systemd -- for now it really doesn't do a whole lot, though.
* What works so far: the configuration files are read, parsed, and
the jobs created.
* The jobs are even initialized, and their message ports created.
* BApplication now retrieves a previously created port from the
launch_daemon for use with BServer.
* Only the registrar actually uses this for now.