make setting channel permissions clearer on API doc

[imaginator]

robotnic
I have a problem with publish permissions.

17:15
simon@buddycloud.com
really?
what's the issue?

17:16
robotnic
How do I set write permission to this: https://laos.buddycloud.com/laos@laos.buddycloud.com

17:16
simon@buddycloud.com
you need to set permissions per node/
let me find the docs…
channel permissions?

17:18
robotnic
I don't really understand the difference between channel and node.
I want to do this: 'xmpp.buddycloud.publish'