Since

	2d77e3a27b7b211f303f.. "Fix bug when both crossmnt and fsid are set"

Subexports automatically created by "crossmnt" get the NFSEXP_FSID flag
cleared.  That flag should also be cleared in the
security-flavor-specific flag fields.  Otherwise the kernel detects the
inconsistent flags and rejects the export.

The symptoms are clients hanging the first time they export a filesystem
mounted under a filesystem that was exported with something like:

	/exports *(crossmnt,fsid=0,sec=krb5)

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>