why crc req on free-inobt & file-type-indir options?

[L.A. Walsh]

Eric Sandeen wrote:
> 
>> On Aug 7, 2015, at 5:50 PM, L.A. Walsh <xfs at tlinx.org> wrote:
>> Q: should the versions of xfsdump&restore be the same as the rest of the xfsprogs?
> Nope, they are separate packages with separate versioning.
---
I see.  So how does one tell which version of xfsdump/restore should
be used to "safely" dump (and restore) a file system made
with version i.j.k of xfsprogs(mkfs.xfs) ?  Or is that possible?