rc.d can now take --started, --stopped, --auto, --noauto as option which
help user to filter list of daemon for all actions

As a corollary list command can now take a list of dameon to display
All kind of arguments can be mixed to obtain the proper output.

zsh and bash completion are updated

Note: Output of help command exit 0 and is no more printed on stderr

Signed-off-by: Sebastien Luttringer <seblu@seblu.net>