BUG/MAJOR: stream-int: don't call si_cs_recv() in stream_int_chk_rcv_conn()

This one causes some events to be lost. It has already been tested in
an experimental branch but was not merged until being certain it was
needed. Fred figured that requesting /?k=1&s=447392 from httpterm through
haproxy-master was enough to stall the transfer.

No backport is needed, this only affects 1.9-dev5.
1 file changed