vty: Prepend VTY output of counters for better visual separation.

Before this patch rate counters started right after trunk information
with no visual separation which was quite confusing. We're adding
a new line and a header to warn a user of the section change.

Change-Id: I3943def03ab821b05ac597f40bdfa4a3a71ddca3
diff --git a/src/libosmo-mgcp/mgcp_vty.c b/src/libosmo-mgcp/mgcp_vty.c
index 3b61c30..fa175e1 100644
--- a/src/libosmo-mgcp/mgcp_vty.c
+++ b/src/libosmo-mgcp/mgcp_vty.c
@@ -262,6 +262,10 @@
 			vty_out(vty, "%s", VTY_NEWLINE);
 	}
 
+	if (show_stats) {
+		vty_out(vty, "%s", VTY_NEWLINE);
+		vty_out(vty, "Rate counters:%s", VTY_NEWLINE);
+	}
 	if (show_stats && cfg->mgcp_crcx_ctr_group) {
 		vty_out(vty, "   %s:%s", cfg->mgcp_crcx_ctr_group->desc->group_description, VTY_NEWLINE);
 		vty_out_rate_ctr_group_fmt(vty, "   %25n: %10c (%S/s %M/m %H/h %D/d) %d", cfg->mgcp_crcx_ctr_group);