Avoid recursing from LRU on reclaims.

The LRU reclaim path should be optimized for speed, not aggressive
reclaims, at least by default.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
CMake: a few conditions to keep portability with cmake 2.6 (used with RHEL6.1)
Log/DBUS: do not include D-Bus header when D-Bus support is not wanted.
CMAKE: restoring libcap detection + restoring "disable FSAL_ZFS if libzfswrap is not here"
CMake: if libcap is successfully detected, link ganesha.nfsd with it.
Capabilities : now printing newly set capabilities (getcaps -like) just after they are set

NOTE: for proper quota management, capabilities have to be set by capget/capset calls from libcap
FSAL_PROXY: now using libntirpc instead of RPC within libC.
FSAL_PROXY: adding missing initialization for attributes structure in pxy_make_object()
Merge remote-tracking branch 'linuxbox2/next' into merge_next