BUG/MEDIUM: mux-h2/htx: Respect the channel's reserve

When data are pushed in the channel's buffer, in h2_rcv_buf(), the mux-h2 must
respect the reserve if the flag CO_RFL_KEEP_RSV is set. In HTX, because the
stream-interface always sees the buffer as full, there is no other way to know
the reserve must be respected.

This patch must be backported to 1.9.
1 file changed