move comment about caching open results
move comment about caching open results

hoping to implement this soon

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

Xeno22/lxcfs,ralt/lxcfs,evgeni/pkg-lxcfs-debian,hallyn/lxcfs,rhatdan/lxcfs,ralt/lxcfs,evgeni/pkg-lxcfs-debian,rhatdan/lxcfs,Xeno22/lxcfs,hallyn/lxcfs