FreeBSD doesn't check type for different requests with same req_sn

[hoelscher]

If FreeBSD gets two Reconfig requests with the same reconfig request sequence number, FreeBSD send the same response to the second request than to the first. This is a RFC like reaction.

see tests sctp-sr-i-pv-13-1 to sctp-sr-i-pv-13-20
https://github.com/nplab/RFC6525_Testsuite/blob/master/implementation_tests/sctp-sr-i-pv/sctp-sr-i-pv-i-13-1.pkt
https://github.com/nplab/RFC6525_Testsuite/blob/master/implementation_tests/sctp-sr-i-pv/sctp-sr-i-pv-i-13-2.pkt
....