+* in pam_systemd: don't rely on /proc/self/loginuid in a container
+
+* take BSD file lock on tty devices when using them?
+
+* tmpfiles should allow two identical lines
+ https://bugzilla.redhat.com/show_bug.cgi?id=690253
+
+* avoid any flag files, or readahead files in /, we need to support r/o /
+ or / on tmpfs like Android setups.