nghttp AuTest fails on master

[bneradt]

I've noticed that autest is failing on master for the nghttp test:
https://ci.trafficserver.apache.org/job/autest-github/16604/console

             [  2.014] recv GOAWAY frame <length=8, flags=0x00, stream_id=0>
                       (last_stream_id=1, error_code=NO_ERROR(0x00), opaque_data(0)=[])
           - [  2.118] recv DATA frame <length=0, flags=0x01, stream_id=1>
           ?                                   ^           ^
           
           + [  2.118] recv DATA frame <length=1, flags=0x00, stream_id=1>
           ?                                   ^           ^
           
           + [  2.418] recv DATA frame <length=1, flags=0x00, stream_id=1>
           + [  2.719] recv DATA frame <length=1, flags=0x01, stream_id=1>
                       ; END_STREAM
             [  2.719] send GOAWAY frame <length=8, flags=0x00, stream_id=0>
                       (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[])

I've reproduced this locally as well.

[bneradt]

This test failure was introduced by the merge of the following PR: #8201. The CI in the PR passed fine because our Jenkins git plugin doesn't run CI on the latest commit after a PR is modified with a subsequent commit.