Features:
+* sort generated hwdb files alphabetically when we import them, so that git
+ diffs remain minimal (in particular: the OUI databases we import are not
+ sorted, and not stable)
+
* set SystemCallArchitectures=native on all our services
* maybe add call sd_journal_set_block_timeout() or so to set SO_SNDTIMEO for
O_NONBLOCK on it. That way people can control if and when to block for
logging.
+* tighten sd_notify() MAINPID= checks a bit: don't accept foreign PIDs (i.e.
+ PIDs not managed by the service manager)
+
* journald: when we recv a log datagram via the native or syslog transports,
search for the PID in the active stream connections, and let's make sure to
always process the datagrams before the streams. Then, cache client metadata