#1324 Add node_creation_policy option in mod_pubsub to change who can create nodes
Description of feature:
Add a configuration option to allow more than admins to create nodes.
Movim and SàT-aware XMPP operators(!) often provide a pubsub component that their users can then use to create different groups/communities/nodes/however that is called.
I guess we would be looking at something similar to https://issues.prosody.im/1196#comment-3
node_creation_policy = "open" -- Anyone may create node
node_creation_policy = "admin" -- Only admins may create node
node_creation_policy = "host" -- Anyone on the "parent" host may create node
node_creation_policy = "server" -- Anyone on the same server may create node, regardless of host