After calling close no SHUTDOWN-Chunk is sent #12
Description
In the following test-case https://github.com/nplab/PR_SCTP_Testsuite/blob/master/nr-sack/with-forward-tsn/with-forward-tsn-5.pkt after calling close no SHUTDOWN-Chunk is sent by the IUT. 300 seconds after calling close an ABORT-Chunk is sent by IUT which is not expected.