install/doc/redhat_readme.txt: Added instructions to check memcached.
install/doc/redhat_readme.txt: Added instructions to check memcached.

csdl/makahiki,csdl/makahiki,yongwen/makahiki,yongwen/makahiki,csdl/makahiki,yongwen/makahiki,csdl/makahiki,yongwen/makahiki