Features:
+* introduce sd_log_open() to create a connection to the syslog bridge via sd-daemon.h
+
* when a bus name of a service disappears from the bus make sure to queue further activation requests
* something like ConditionExec= or ExecStartPre= without failure state
- how to pass throw-away units to systemd, or dynamically change properties of existing units
- how to integrate cgconfig and suchlike with systemd
- security properties
+ - inetd conversion
* allow port=0 in .socket units