Fix "rtable N" check

pfctl parse.y r.1702 enforced rtables to exist at ruleset creation time
but rtable 7 does not exist (this regress only tests the parser), so use 0.

Spotted by tb.

Update regress tests for the following changes:
- if_addr RB_TREE (Address sort differently on an interface)
- skip steps changes
- RDOMAIN
- reordering of address/port tests
- fastroute is gone
-

Update regress tests for the following changes:
- if_addr RB_TREE (Address sort differently on an interface)
- skip steps changes
- RDOMAIN
- reordering of address/port tests
- fastroute is gone
- keep state is no longer printed by default
- lo0 now has link-local scope address in addition to ::1

show more ...

very basic regress test for rtable select code