util.hashring: Support associating arbitrary data with nodes In this API, a 'node' is always a simple text string. Sometimes the caller may have a more complex structure representing a node, but the hash ring is really only concerned with the node's name. This API change allows :add_nodes() to take a table of `node_name = value` pairs, as well as the simple array of node names previously accepted. The 'value' of the selected node is returned as a new second result from :get_node(). If no value is passed when a node is added, it defaults to `true` (as before, but this was never previously exposed).

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local set = require "util.set";

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return {

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	available = set.new{

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		-- mod_bookmarks bundled

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		"mod_bookmarks";

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		-- Roles, module.may and per-session authz

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		"permissions";

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	};

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};