Only use the mkdtemp(3) route in pr_fsio_smkdir() if root privs are needed
for setting the desired ownership, i.e. UserOwner/GroupOwner are in effect.
Merge pull request #41 from proftpd/core-smkdir-only-when-needed

Only use the mkdtemp(3) route in pr_fsio_smkdir() if root privs are need...