Merge branch 'jk/async-pkt-line'

The debugging infrastructure for pkt-line based communication has
been improved to mark the side-band communication specifically.

* jk/async-pkt-line:
  pkt-line: show packets in async processes as "sideband"
  run-command: provide in_async query function

run-command.h

@@ -118,5 +118,6 @@ struct async {
 
 int start_async(struct async *async);
 int finish_async(struct async *async);
+int in_async(void);
 
 #endif