BUG/MEDIUM: h1: Allow reception if we have early data

BUG/MEDIUM: h1: Allow reception if we have early data

In h1_recv_allowed(), do not forbid the reception if we are yet to
complete the connection, if we have received early data on it. That way,
we can deal with them right away, instead of waiting for the handshake
to be done.

This should be backported up to 2.8.

(cherry picked from commit aa25ddb773e484793a5c245bfa3f98b917c215be)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 1e4b80a8be585024e1993c6fdd460edcbf239d12)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 00beb362dde7fad080a3e0e768738bfef7f46c39)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>