Merge branch 'js/avoid-split-sideband-message'

The side-band status report can be sent at the same time as the
primary payload multiplexed, but the demultiplexer on the receiving
end incorrectly split a single status report into two, which has
been corrected.

* js/avoid-split-sideband-message:
  test-pkt-line: drop colon from sideband identity
  sideband: report unhandled incomplete sideband messages as bugs
  sideband: avoid reporting incomplete sideband messages

sideband.c

@@ -190,7 +190,7 @@ int demultiplex_sideband(const char *me, char *buf, int len,
 		return 0;
 	case 1:
 		*sideband_type = SIDEBAND_PRIMARY;
-		break;
+		return 1;
 	default:
 		strbuf_addf(scratch, "%s%s: protocol error: bad band #%d",
 			    scratch->len ? "\n" : "", me, band);