Features:
+* bus-proxy: when passing messages from kdbus, make sure we properly
+ handle the case where a large number of fds is appended that we
+ cannot pass into sendmsg() of the AF_UNIX sokcet (which only accepts
+ 253 messages)
+
+* check for validity of ucred fields in bus-proxy, like we do in journald
+
* busctl: add a pcap writer, using LINKTYPE_DBUS/231
* man: maybe use the word "inspect" rather than "introspect"?