http2: store headersSent after stream destroyed
Store headersSent
directly on response state after finish event is triggered, so that users can always access it.
Fixes: https://github.com/nodejs/node/issues/15226
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
http2, test