Role status events (from Dingwanfu - Huawei).
Fix typo preventing compile.
Send gratuitous role status message on master loss (from Dingwanfu - Huawei).
Remove OFPCRR_MASTER_FAIL which is not defined by the spec.
Reject goto instruction in the last table.
When switch has one table, don't advertise goto instruction.
Add ability to set and display XIDs in dpctl
Change default TCP port to 6653 (IANA official allocation)
OXM_OF_IPV6_EXTHDR can't be used with set-field.
Allow dpctl to set ipv6_exthdr to trigger error message.
Implement OFPFF_RESET_COUNTS for flow-mod modify.
EXT-387: Implement an exact-match 5 tupple table.
Make DSCP_REMARK increase drop precedence in IP packets (see EXT-416).
Properly handle error in table features.
Display table features errors.
EXT-436: Pretend we don't support setting table-features and return an error.
Fix missing reply xid to dpctl_transact
Fix lots of ugly warnings
Revert "EXT-436: Pretend we don't support setting table-features and return an error."

This reverts commit f6bdeeb6c16a730838d7e226aee90883fc501521.
This was prototyping code that cripple the switch. This was not supposed to be merged.
Fix revert of EXT-436, add back necessary local variables.