http2: destroy() stream, upon errnoException
First steps towards #19060
Attempting to move lib/net
and lib/http2/core
towards similar API, for all work of reading and writing from underlying stream.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines