Features:
+* add sd_journal_get_timeout() and sd_journal_get_events(9
+
* seems that when we follow symlinks to units we prefer the symlink
destination path over /etc and /usr. We shouldn't do that. Instead
/etc should always override /run+/usr and also any symlink
#endif
/* TODO:
+ * - allow registration/removl of callbacks from within callbacks
+ * - don't allow recursive processing
+ *
* - add page donation logic
* - api for appending/reading fixed arrays
* - merge busctl into systemctl or so?