This is to allow us to get useful information on messaging without being overwhelmed by the rest of groups debug.
Enabled with [Groups] DebugMessagingEnabled = true in config (default false)
Or "debug groups messaging verbose true|false on the console" (similar to existing groups setting).
Done for both xmlrpc and V2 groups.
This was because the "session ID" when the message template was copied was always replaced with the group ID, whereas a notice requires this to be the notice ID.
Instead just copy the "session ID" as is - other callers already have this set properly so replacing with group ID was redundant anyway.
Relates to http://opensimulator.org/mantis/view.php?id=7037
Offline notices can still be controlled with the [Messaging] ForwardOfflineGroupMessages setting.
Looks to address more of http://opensimulator.org/mantis/view.php?id=7037
Only for Flotsam now for testing, but if approach works should be possible with core offline notices as well.
This is because xmlrpcgroups currently always checks visibility for the requesting agent ID (unlike Groups v2, which can accept UUID.Zero)
But group notice IMs have a from agent which is the group rather than the sending agent.
Further addresses http://opensimulator.org/mantis/view.php?id=7037
This retrieves and caches information from the PresenceService to only send messages to online users.
This is reported to much improve performance for large groups where most users are offline.
Cache is 20 seconds to balance requests against users not receiving messages until cache updates.
This is an alternative to an approach where login/logout notification is sent directly from simulator to groups service.
However, I'm not convinced that this PresenceService approach is actually better. Needs more thought.
This allows the groups xmlrpc server to act appropriately if the requesting agent has permission to see all group members
Not sure why this wasn't being done before...
