Minor spell mistake in comment

[sandeepksaini]

Team, @c9n

There is a minor spell mistake on line number 100, where future is misspelled as "futute" under "message AclFeatureProto" section.

Here is code snippet:
message AclFeatureProto {
/**
* An ACL entry is represented by a 32-bit integer in Big Endian
* format. The bits can be divided in four segments:
* [0:2) || [2:26) || [26:27) || [27:29) || [29:32)
*
* [0:2) -- reserved for futute uses.
* [2:26) -- the name of the entry, which is an ID that points to a
* string in the StringTableSection.
* [26:27) -- the scope of the entry (AclEntryScopeProto)
* [27:29) -- the type of the entry (AclEntryTypeProto)
* [29:32) -- the permission of the entry (FsActionProto)
*
*/