Command help match also on aliases

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/parse.c b/parse.c
index 7f16202..a0242c2 100644
--- a/parse.c
+++ b/parse.c
@@ -524,7 +524,8 @@
 		int match = 0;
 
 		if (name) {
-			if (!strcmp(name, o->name))
+			if (!strcmp(name, o->name) ||
+			    (o->alias && !strcmp(name, o->alias)))
 				match = 1;
 			else {
 				unsigned int dist;