kernel - Add kqueue support to NFS (fix firefox issues w/nfs)
* Firefox appears to get semi-random memory corruption and otherwise
implodes if one or more filesystems it accesses does not support
kqueue. This appears to be due to some interaction between
firefox, glib, and the kernel when kqueue support is missing
from a filesystem.
* Add host-local kqueue support to NFS. As with locks, the support
is host-local only and will not work across multiple clients
sharing the same files.
* Appears to stabilize firefox when file(s) it accesses are on
NFS.