Fix ^C propagation

dotlib/post/cattle.sh

@@ -25,6 +25,8 @@ cd() {
 }
 
 {
+  trap true EXIT # A permanently temporary workaround, since ^C outside of a
+                 # command appears to propagate to the child process.
   trap cattle-reset-elapsed USR1
   trap cattle-increase-timeout USR2
   last_cmd_at=0 timeout=3600