issue #223: correctly detect if reversible data have to be removed after hived restart

• now fork event is added only when hived wills end notification, no artificial event during 'hive.connect'
• hive.connect is always executed before on_reindex notification, before data are marked as dirty

src/hive_fork_manager/authorization.sql

@@ -151,7 +151,7 @@ GRANT EXECUTE ON FUNCTION
     , hive.register_state_provider_tables( _context hive.context_name )
     , hive.app_state_providers_update( _first_block hive.blocks.num%TYPE, _last_block hive.blocks.num%TYPE, _context hive.context_name )
     , hive.app_state_provider_import( _state_provider hive.state_providers, _context hive.context_name )
-    , hive.connect( _git_sha TEXT, _block_num hive.blocks.num%TYPE, BOOL )
+    , hive.connect( _git_sha TEXT, _block_num hive.blocks.num%TYPE )
     , hive.remove_inconsistent_irreversible_data()
     , hive.disable_indexes_of_reversible()
     , hive.enable_indexes_of_reversible()