lots of work on federated channel discovery

doc/hook/discover_by_webbie.bb

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-[h2]discover_by_webbie[/h2]

doc/hook/discover_channel_webfinger.bb

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+[h2]discover_channel_webfinger[/h2]
+
+Called after performing channel discovery using RFC7033 webfinger and where the channel is not recognised as zot. 
+
+Passed an array:
+
+	address: URL or address that is being discovered
+	success: set to true if the plugin discovers something
+	webfinger: array of webfinger links (output of webfinger_rfc7033())
+
+
+	if your plugin indicates success you are expected to generate and populate an xchan (and hubloc) record prior to returning. 
+
+