Several filter changes. (Pavel, please check if they are OK.)
o Changed parameters of f_run. Changed rtein+rteout pair to rte pointer passed by reference, added ea_list of temporary attrs again passed by reference and finally added a pointer to memory pool for storing temporary data (new ea_lists's, temporary rta's etc.). o Re-ordered result codes, so that all accepts come before all rejects. o Introduced FILTER_ACCEPT and FILTER_REJECT dummy values (will be used in protocol configurations). o Added filter_name() which returns name of a filter or ACCEPT/REJECT for the dummies.