protocol value for all traffic should be -1

If it is all traffic instead of all tcp traffic , protocol should be equal -1 , otherwise indicate all tcp not all traffic

website/source/docs/providers/aws/r/security_group.html.markdown

@@ -22,14 +22,14 @@ resource "aws_security_group" "allow_all" {
   ingress {
       from_port = 0
       to_port = 65535
-      protocol = "tcp"
+      protocol = "-1"
       cidr_blocks = ["0.0.0.0/0"]
   }
 
   egress {
       from_port = 0
       to_port = 65535
-      protocol = "tcp"
+      protocol = "-1"
       cidr_blocks = ["0.0.0.0/0"]
   }
 }