mgcp/test: Only include conn_mode into test output

Currently the conn_mode and the output_enabled flags are printed to
stdout.

This patch modifies this to print the output_enabled flags to stderr
instead. The bits in conn_mode are shown as RECV, SEND, and LOOP.
This does not reduce the significance of the test, since there is an
assertion already that verifies the values of the output_enabled
flags with respect to the conn_mode.

Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/mgcp/mgcp_test.c b/openbsc/tests/mgcp/mgcp_test.c
index fa68867..5f69072 100644
--- a/openbsc/tests/mgcp/mgcp_test.c
+++ b/openbsc/tests/mgcp/mgcp_test.c
@@ -399,13 +399,22 @@
 			else
 				printf("Requested packetization period not set\n");
 
-			if ((endp->conn_mode & CONN_UNMODIFIED) == 0)
-				printf("Connection mode: %d, "
-				       "BTS output %sabled, NET output %sabled\n",
+			if ((endp->conn_mode & CONN_UNMODIFIED) == 0) {
+				printf("Connection mode: %d:%s%s%s%s\n",
 				       endp->conn_mode,
-				       endp->bts_end.output_enabled ? "en" : "dis",
-				       endp->net_end.output_enabled ? "en" : "dis");
-			else
+				       !endp->conn_mode ? " NONE" : "",
+				       endp->conn_mode & MGCP_CONN_SEND_ONLY ?
+				       " SEND" : "",
+				       endp->conn_mode & MGCP_CONN_RECV_ONLY ?
+				       " RECV" : "",
+				       endp->conn_mode & MGCP_CONN_LOOPBACK &
+				       ~MGCP_CONN_RECV_SEND ?
+				       " LOOP" : "");
+				fprintf(stderr,
+					"BTS output %sabled, NET output %sabled\n",
+					endp->bts_end.output_enabled ? "en" : "dis",
+					endp->net_end.output_enabled ? "en" : "dis");
+			} else
 				printf("Connection mode not set\n");
 
 			OSMO_ASSERT(endp->net_end.output_enabled ==