Major Description
When ATS with --enable-debug recieve a frame which has unknown frame type in HTTP/2 stream, ATS aborts.
ATS should just discard unknown frame.
FATAL: Http2ConnectionState.cc:643: failed assert `frame->header().type < HTTP2_FRAME_TYPE_MAX` traffic_server: Aborted (Signal sent by tkill() 1 99)traffic_server - STACK TRACE: /opt/ats/bin/traffic_server(_Z19crash_logger_invokeiP7siginfoPv+0xc3)[0x4fc831] /lib64/libpthread.so.0(+0xf710)[0x7f00d1762710] /lib64/libc.so.6(gsignal+0x35)[0x7f00cfe79625] /lib64/libc.so.6(abort+0x175)[0x7f00cfe7ae05] /opt/ats/lib/libtsutil.so.6(_Z12ink_fatal_vaPKcP13__va_list_tag+0x0)[0x7f00d253e839] /opt/ats/lib/libtsutil.so.6(_Z9ink_fatalPKcz+0x0)[0x7f00d253e8f0] /opt/ats/lib/libtsutil.so.6(_Z10ink_pfatalPKcz+0x0)[0x7f00d253e9b5] /opt/ats/lib/libtsutil.so.6(+0x3a54a)[0x7f00d253c54a] /opt/ats/bin/traffic_server(_ZN20Http2ConnectionState18main_event_handlerEiPv+0x2f2)[0x5d8a18] /opt/ats/bin/traffic_server(_ZN12Continuation11handleEventEiPv+0x6c)[0x4ffaae]