Create motd test for regular user with MESSAGE param

Author: Aaron

host_test.go

@@ -176,6 +176,11 @@ func TestMotdCommand(t *testing.T) {
 t.Error("failed to print MOTD using /motd with no parameters", "actual:", actual, "expected:", expected)
 }
 
+// Test as regular user - expected behaviour: should return an error
+w.Write([]byte("/motd foobarbaz\r\n"))
+if strings.Compare(host.motd, "foobar") != 0 {
+t.Error("failed to hinder non-OPs to modify the MOTD")
+}
 return nil
 })
 }