Revert "Move most of NFS file handle affinity code out of the heavily congested"

This reverts commit 875d076996e574120600940920a0b0ef8961208e.

Ticket: #4052

mav@ will need to look at this when he gets back online.
Starting lockd and statd before DAEMON is not required
MFC r229663: Allow to change vfs.zfs.arc_meta_limit at runtime.

- Change vfs.zfs.arc_meta_used from CTLFLAG_RDTUN to CTLFLAG_RD,
as it is not a tunable.

MFC slacker:	pjd
MFC r258294:
Fix ZFS deadlock when sending a snapshot which is mounted.

Approved by:	re (glebius)
Sponsored by:	Multiplay
ZFS/GFS handling fixes