[server] add a looping task to free unused cnxsets capture by dead pyro When a pyro client disconnects, we're not necessarily notified so they can hang on to their session/cnxset forever. Don't let them do that. The hacky looping task is only installed when pyro is enabled. This optional activation save this very hacky patch from being rejected. closes #2825380

     1

sync_schema_props_perms('CWSourceHostConfig', syncperms=False)

     2

     3

sql('INSERT INTO cw_source_relation(eid_from, eid_to) '

     4

    'SELECT e.eid,s.cw_eid FROM entities as e, cw_CWSource as s '

     5

    'WHERE s.cw_name=e.source AND NOT EXISTS(SELECT 1 FROM cw_source_relation WHERE eid_from=e.eid AND eid_to=s.cw_eid)')

     6

commit()