Re: [sr-dev] [kamailio/kamailio] RPC command stats.get_statistics randomly reporting 9223372036854776000 for current active/early dialogs (#1591)

The rpc command `dlg.stats_active` goes over the internal hash table of dialog module and counts the dialogs that are in active state, so what ever is there, local or replicated dialogs.

Counters are exposed to inconsistency if adding/removing is triggered by events that can appear many times, so maybe the statistic related to active calls should be changed to a callback counting in a similar manner as the rpc command. There are other statistics that have a callback function behind instead of a counter.