Javadoc
[DFS Root referral request] Issue a DFS root referral request, as specified in section 3.1.4.2,
providing "ROOT", the first path component, UserCredentials, MaxOutputSize, and Path as parameters.
The processing of the referral response and/or error is as specified in section 3.1.5.4.3, which will update the ReferralCache
on success. On DFS root referral request success, go to step 7.
On DFS root referral request failure:
1. If the immediately preceding processing step was step 5.2.3, this is a domain name or path. Go to step 13.
2. If processing of this I/O request encountered a ReferralCache hit, or one of its DFS referral requests succeeded
(as would have occurred in the case of a previous Interlink - see step 11 - or a domain root referral,
when entering from step 5), the path is in a DFS namespace. Go to step 14.
3. The path is not a DFS path and no further processing is required. Go to step 12.