pfctl fails to add addresses to undefined/inactive table

pfctl fails to add addresses to undefined/inactive table

pfr_add_tables() function must set PFR_TFLAG_ACTIVE flag
to table which is attached to rule. This will then allow
pfr_add_addrs() to populate the table with addresses.

without this pair of pfctl(8) commands fails as follows:
    # echo 'pass from <foo> to any' |pfctl -f -
    # pfctl -t foo -T add 192.168.1.0/24
    pfctl: Table does not exist

OK mbuhl@