Update client option documentation.
* Fix `gh #136 <https://github.com/awesomized/libmemcached/issues/136>`_\ :
``libmemcachedutil`` is underlinked (link against libmemcached).
Update client option documentation.
* Fix `gh #136 <https://github.com/awesomized/libmemcached/issues/136>`_\ :
``libmemcachedutil`` is underlinked (link against libmemcached).