doc: Add description about ignoring lxc.cgroup.use when using cgmanager

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
download: Make --keyserver actually work

Reported-by: NeilGreenwood <neil.greenwood@gmail.com>
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
port lxc-top from lua to C for wider availability

- keep but rename the lua version as an example of how to use the lua API

- got rid of the fairly useless --max argument

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>