main: Log command read from source

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Ifeec81b37768052cabed63ff814499c8972817e1
diff --git a/main.c b/main.c
index a1b4953..8bfec4d 100644
--- a/main.c
+++ b/main.c
@@ -471,9 +471,11 @@
 	while (!(rc = source->ops->poll(source->ctx, &command))) {
 		switch (command) {
 		case 'D':
+			warnx("Debug action triggered\n");
 			sink->ops->debug(sink->ctx);
 			break;
 		case 'R':
+			warnx("Reboot action triggered\n");
 			sink->ops->reboot(sink->ctx);
 			break;
 		default: