Merge branch 'dev' of https://github.com/redmatrix/hubzilla into doco

doc/hook/update_unseen.bb

@@ -0,0 +1,9 @@
+[h3]update_unseen[/h3]
+
+Called prior to automatically marking items 'seen'; allowing a plugin the choice to not perform this action.
+
+hook data
+
+[ 'channel_id' => local_channel(), 'update' => 'unset' ];
+
+If 'update' is set to 0 or false on return, the update operation is not performed.  

doc/hooklist.bb

@@ -572,6 +572,9 @@ Hooks allow plugins/addons to "hook into" the code at many points and alter the
 [zrl=[baseurl]/help/hook/tagged]tagged[/zrl]
 	Called when a delivery is processed which results in you being tagged
 
+[zrl=[baseurl]/help/hook/update_unseen]update_unseen[/zrl]
+	Called prior to automatically marking items seen which were loaded in the browser
+
 [zrl=[baseurl]/help/hook/validate_channelname]validate_channelname[/zrl]
 	Used to validate the names used by a channel