device: set recursive_stop=true by default

TODO

@@ -72,6 +72,8 @@
 
 * only add quotacheck deps to .mount units which mention grpquota/usrquota in the mount flags
 
+* Introduce weaker Conflicts.
+
 External:
 
 * patch kernel for xattr support in /dev, /proc/, /sys and /sys/fs/cgroup.

src/device.c

@@ -69,6 +69,12 @@ static void device_init(Unit *u) {
          * happen for the other units since their operations time out
          * anyway. */
         d->meta.job_timeout = DEFAULT_TIMEOUT_USEC;
+
+        /* We enable recursive stopping by default for all
+        devices. This enables the user to use Requires= to make a
+        service go a way when a device goes away, and Wants=
+        otherwise. */
+        d->meta.recursive_stop = true;
 }
 
 static void device_done(Unit *u) {