- Define a ZFS_LINK_MAX as the ZFS version of LINK_MAX which is set to
UINT64_MAX to match the on-disk format.
- Enable the currently #if 0'd code to check for link overflows and
return EMLINK.
- Don't clamp the link count reported in stat() to LINK_MAX as that is
still the 16-bit limit, but report the full link counts. Also,
avoid possibly overflowing the reported link count to 0 when adjusting
the link count to account for ".snapshot".
- Update the LINK_MAX reported by pathconf() to report ZFS_LINK_MAX
rather than LINK_MAX (but clamped to LONG_MAX for 32-bit systems).
Reviewed by: avg (earlier version)
Sponsored by: Chelsio Communications
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