+Before v244:
+
+* revisit SystemdOptions EFI variable. Find a better, systematic name and use
+ it for the env var, the bootctl verb and the EFI variable itself, clear up
+ semantics.
+
+* Figure out a better name for the global per-unit-type drop-in dirs, it's
+ confusing when it comes to -.mount.d/ (is it a drop-in-dir for all mount
+ units, or one for the root mount?). Also, OOM handling in
+ service_unit_name_is_valid() is borked.
+