split 'mode' into IsOnline and IsDaemon flags

1. They don't _have_ to be mutually exclusive.
2. local, mode, etc is _really_ confusing.

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

core/commands/mount_unix.go

@@ -92,7 +92,7 @@ baz
 		}
 
 		// error if we aren't running node in online mode
-		if nd.LocalMode() {
+		if !nd.IsOnline {
 			return ErrNotOnline
 		}